Abstract: Approaches to leveraging knowledge base of groups in mining organizational data. A communication service initiates operation(s) to leverage knowledge base of groups upon detecting a question supplied by a requestor. Contextual information associated with the requestor is determined in relation to the question. Next, a knowledge graph is queried with the question and the contextual information. An answer associated with the question is identified within the knowledge graph. The answer includes a source. Furthermore, the answer and the source is provided to the requestor. Upon receiving to feedback associated with the answer from the requestor, the knowledge graph is modified based on the feedback.

Abstract: Variety of approaches to provide an event based activity service are described. A communication service initiates operations) to provide the event based activity service upon analyzing at least a portion of a conversation. An activity associated with the conversation is inferred froth the analyzed portion. Next, an item associated with the activity is created. A creation notification associated with the item is inserted into the conversation.