diff --git a/Datanalitica.package/DiscourseTopic.class/instance/addKeyword.to..st b/Datanalitica.package/DiscourseTopic.class/instance/addKeyword.to..st
index 26d5e49..4ad05a9 100644
--- a/Datanalitica.package/DiscourseTopic.class/instance/addKeyword.to..st
+++ b/Datanalitica.package/DiscourseTopic.class/instance/addKeyword.to..st
@@ -1,5 +1,3 @@
 accessing
 addKeyword: keyword to: subtopic
-	self subtopics 
-		at: subtopic put: keyword;
-		yourself.
\ No newline at end of file
+	(self subtopics at: subtopic) add: keyword.
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPI.class/instance/userMentionsFor..st b/Datanalitica.package/TwitterAPI.class/instance/userMentionsFor..st
index 9efe433..2ea7009 100644
--- a/Datanalitica.package/TwitterAPI.class/instance/userMentionsFor..st
+++ b/Datanalitica.package/TwitterAPI.class/instance/userMentionsFor..st
@@ -1,5 +1,4 @@
 accessing
 userMentionsFor: username
-	| rawResponse queryURL |
 	"The following query gets the last 100 mentions that is the maximun allowed for a particular user without pagination:"
 	^ self userQueryFor: username selecting: 'mentions'
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPI.class/instance/userQueryFor.selecting..st b/Datanalitica.package/TwitterAPI.class/instance/userQueryFor.selecting..st
index 450f1a6..fa9d2d5 100644
--- a/Datanalitica.package/TwitterAPI.class/instance/userQueryFor.selecting..st
+++ b/Datanalitica.package/TwitterAPI.class/instance/userQueryFor.selecting..st
@@ -4,4 +4,7 @@ userQueryFor: username selecting: tweetsOrMentions
 	"The following query gets the last 100 tweets or mentions that is the maximun allowed for a particular user without pagination:"
 	queryURL := self userEndPointFor: username selecting: tweetsOrMentions.
 	rawResponse := self rawResponseForURL:queryURL.  
-	^ TwitterAPIResponse new fromDictionary: (STONJSON fromString: rawResponse)
\ No newline at end of file
+	^ TwitterAPIResponse new 
+		fromDictionary: (STONJSON fromString: rawResponse);
+		queryURL: queryURL;
+		date: DateAndTime now.
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPI.class/instance/usersGroupMentioning..st b/Datanalitica.package/TwitterAPI.class/instance/usersGroupMentioning..st
index 25e9cbd..36c294b 100644
--- a/Datanalitica.package/TwitterAPI.class/instance/usersGroupMentioning..st
+++ b/Datanalitica.package/TwitterAPI.class/instance/usersGroupMentioning..st
@@ -1,5 +1,8 @@
 accessing
 usersGroupMentioning: userName
+	| response |
+	response := self userQueryFor: userName selecting: 'mentions'.
 	^ TwitterUsersGroup new
-		users: (self usersMentioning: userName);
-		title: 'Users mentioning @', userName
\ No newline at end of file
+		users: response messagesAuthors;
+		title: 'Users mentioning @', userName;
+		origin: response queryURL
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/instance/date..st b/Datanalitica.package/TwitterAPIResponse.class/instance/date..st
new file mode 100644
index 0000000..9d04a8e
--- /dev/null
+++ b/Datanalitica.package/TwitterAPIResponse.class/instance/date..st
@@ -0,0 +1,4 @@
+accessing
+date: aDateAndTime
+	"As answers to the same query can change over time, for example regarding deteled users, its important to know where a query was ran."
+	date := aDateAndTime 
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/instance/date.st b/Datanalitica.package/TwitterAPIResponse.class/instance/date.st
new file mode 100644
index 0000000..c536804
--- /dev/null
+++ b/Datanalitica.package/TwitterAPIResponse.class/instance/date.st
@@ -0,0 +1,3 @@
+accessing
+date
+	^ date
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/instance/fromQueryURL..st b/Datanalitica.package/TwitterAPIResponse.class/instance/fromQueryURL..st
new file mode 100644
index 0000000..b86e6c5
--- /dev/null
+++ b/Datanalitica.package/TwitterAPIResponse.class/instance/fromQueryURL..st
@@ -0,0 +1,3 @@
+accessing
+fromQueryURL: aQueryURLString
+	
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL..st b/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL..st
new file mode 100644
index 0000000..4fc36ca
--- /dev/null
+++ b/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL..st
@@ -0,0 +1,3 @@
+accessing
+queryURL: aQueryURLString
+	queryURL := aQueryURLString
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL.st b/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL.st
new file mode 100644
index 0000000..34197cb
--- /dev/null
+++ b/Datanalitica.package/TwitterAPIResponse.class/instance/queryURL.st
@@ -0,0 +1,3 @@
+accessing
+queryURL
+	^ queryURL
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterAPIResponse.class/properties.json b/Datanalitica.package/TwitterAPIResponse.class/properties.json
index 463b718..767ab7d 100644
--- a/Datanalitica.package/TwitterAPIResponse.class/properties.json
+++ b/Datanalitica.package/TwitterAPIResponse.class/properties.json
@@ -8,7 +8,9 @@
 	"instvars" : [
 		"data",
 		"includes",
-		"meta"
+		"meta",
+		"queryURL",
+		"date"
 	],
 	"name" : "TwitterAPIResponse",
 	"type" : "normal"
diff --git a/Datanalitica.package/TwitterUsersGroup.class/README.md b/Datanalitica.package/TwitterUsersGroup.class/README.md
index e69de29..d1f8f68 100644
--- a/Datanalitica.package/TwitterUsersGroup.class/README.md
+++ b/Datanalitica.package/TwitterUsersGroup.class/README.md
@@ -0,0 +1,5 @@
+I model a group of Twitter users. Generally I am the result of running a query on the Twitter API or refining over another
+Twitter users group.
+
+I have methods that allow the running of such queries and making visualizations on particular properties of my users
+or their tweets and in the future I will support topic modelling.
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterUsersGroup.class/instance/origin..st b/Datanalitica.package/TwitterUsersGroup.class/instance/origin..st
new file mode 100644
index 0000000..c1a36f6
--- /dev/null
+++ b/Datanalitica.package/TwitterUsersGroup.class/instance/origin..st
@@ -0,0 +1,4 @@
+accessing
+origin: anObject
+
+	origin := anObject
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterUsersGroup.class/instance/origin.st b/Datanalitica.package/TwitterUsersGroup.class/instance/origin.st
new file mode 100644
index 0000000..132b402
--- /dev/null
+++ b/Datanalitica.package/TwitterUsersGroup.class/instance/origin.st
@@ -0,0 +1,4 @@
+accessing
+origin
+
+	^ origin
\ No newline at end of file
diff --git a/Datanalitica.package/TwitterUsersGroup.class/properties.json b/Datanalitica.package/TwitterUsersGroup.class/properties.json
index f33278e..fead877 100644
--- a/Datanalitica.package/TwitterUsersGroup.class/properties.json
+++ b/Datanalitica.package/TwitterUsersGroup.class/properties.json
@@ -1,5 +1,5 @@
 {
-	"commentStamp" : "",
+	"commentStamp" : "<historical>",
 	"super" : "Object",
 	"category" : "Datanalitica-Datanalitica",
 	"classinstvars" : [ ],
@@ -8,7 +8,8 @@
 	"instvars" : [
 		"users",
 		"title",
-		"discourseTopics"
+		"discourseTopics",
+		"origin"
 	],
 	"name" : "TwitterUsersGroup",
 	"type" : "normal"