Techniques for identification of a trigger-type leader in a social network are described. According to various embodiments, a specific content item posted by a particular actor of a plurality of actors and interactions by other actors of the plurality of actors with the specific content item are identified. A leadership score associated with the particular actor is then calculated, the leadership score indicating a propensity of the particular actor to stimulate discussion among actors of the online social network service. The particular actor is then classified as an information trigger among the plurality of actors of the online social network service, based on the calculated leadership score.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method comprising: accessing interaction data describing interactions between a plurality of actors of the online social network service and one or more content items posted on the online social network service; identifying, based on the interaction data, a specific content item posted by a particular actor of the plurality of actors and interactions by other actors of the plurality of actors with the specific content item; calculating, by a machine including a memory and at least one processor and based on the interaction data, a leadership score associated with the particular actor, the leadership score indicating a propensity of the particular actor to stimulate discussion among actors of the online social network service; and classifying the particular actor as an information trigger among the plurality of actors of the online social network service, based on the calculated leadership score. 2. The method of claim 1, wherein the calculating further comprises: determining a number of comments that the specific content item posted by the particular actor has received within a predefined period of time after being posted. 3. The method of claim 1, wherein the calculating further comprises: determining that the specific content item posted by the particular actor corresponds to provocative or unconventional content. 4. The method of claim 1, wherein the calculating further comprises: determining a number of actors of the online social network service that have interacted with the specific content item posted by the particular actor, the interacting corresponding to viewing, clicking, liking, sharing, following, or commenting on the specific content item posted by the particular actor. 5. The method of claim 1, wherein the specific content item posted by the particular actor is at least one of an article, a message, a comment, a question, a statement, a status update, or media content. 6. The method of claim 1, wherein the interacting by the other actors corresponds to viewing, clicking, liking, sharing, following, or commenting on the specific content item posted by the particular actor. 7. The method of claim 1, further comprising: accessing an electronic sociograph depicting the plurality of actors of the online social network service as nodes in the sociograph, the sociograph including edges extending between the nodes that represent relationships between the respective actors; and annotating a node in the sociograph corresponding to the particular actor with information indicating that the particular actor is classified as the information trigger. 8. The method of claim 1, wherein the identifying further comprises: accessing an electronic sociograph depicting the plurality of actors of the online social network service as nodes in the sociograph, the sociograph including edges extending between the nodes that represent relationships between the respective actors; and generating a sub-sociograph based on the sociograph, the sub-sociograph including annotated flows between nodes representing the interactions by the other actors with the specific content item posted by the particular actor, the interacting corresponding to viewing, clicking, liking, sharing, following, or commenting on the specific content item posted by the particular actor. 9. The method of claim 8, wherein profile data and relationship data associated with the plurality of actors of the online social network service are omitted from the sub-sociograph. 10. The method of claim 1, further comprising: determining that the particular actor has posted an additional content item on the online social network service, the additional content item corresponding to an article or a comment; and promoting the additional content item in a content feed or a list of comments associated with the online social network service. 11. The method of claim 1, wherein the particular actor is least one of a: a member of the online social network service; and an entity of the online social network service, wherein the entity corresponds to at least one of a company entity, a group entity, and an educational entity associated with the online social network service. 12. A system comprising: a machine including a memory and at least one processor; a interaction module configured to: access interaction data describing interactions between a plurality of actors of the online social network service and one or more content items posted on the online social network service; and identify, based on the interaction data, a specific content item posted by a particular actor of the plurality of actors and interactions by other actors of the plurality of actors with the specific content item; and a leadership module, executable by the machine, configured to: calculate, based on the interaction data, a leadership score associated with the particular actor, the leadership score indicating a propensity of the particular actor to stimulate discussion among actors of the online social network service; and classify the particular actor as an information trigger among the plurality of actors of the online social network service, based on the calculated leadership score. 13. The system of claim 12, wherein the leadership module is further configured to: determine a number of comments that the specific content item posted by the particular actor has received within a predefined period of time after being posted. 14. The system of claim 12, wherein the leadership module is further configured to: determine that the specific content item posted by the particular actor corresponds to provocative or unconventional content. 15. The system of claim 12, wherein the leadership module is further configured to: determine a number of actors of the online social network service that have interacted with the specific content item posted by the particular actor, the interacting corresponding to viewing, clicking, liking, sharing, following, or commenting on the specific content item posted by the particular actor. 16. The system of claim 12, wherein the specific content item posted by the particular actor is at least one of an article, a message, a comment, a question, a statement, a status update, or media content. 17. A non-transitory machine-readable storage medium comprising instructions that, when executed by one or more processors of a machine, cause the machine to perform operations comprising: accessing interaction data describing interactions between a plurality of actors of the online social network service and one or more content items posted on the online social network service; identifying, based on the interaction data, a specific content item posted by a particular actor of the plurality of actors and interactions by other actors of the plurality of actors with the specific content item; calculating, based on the interaction data, a leadership score associated with the particular actor, the leadership score indicating a propensity of the particular actor to stimulate discussion among actors of the online social network service; and classifying the particular actor as an information trigger among the plurality of actors of the online social network service, based on the calculated leadership score. 18. The storage medium of claim 17, wherein the calculating further comprises: determining a number of comments that the specific content item posted by the particular actor has received within a predefined period of time after being posted. 19. The storage medium of claim 17, wherein the calculating further comprises: determining that the specific content item posted by the particular actor corresponds to provocative or unconventional content. 20. The storage medium of claim 17, wherein the calculating further comprises: determining a number of actors of the online social network service that have interacted with the specific content item posted by the particular actor, the interacting corresponding to viewing, clicking, liking, sharing, following, or commenting on the specific content item posted by the particular actor.