Techniques for identification of a broker-type leader in a social network based on network topology are described. According to various embodiments, an electronic sociograph is accessed, the electronic sociograph depicting a plurality of actors of an online social network service as nodes in the sociograph, and the sociograph including edges between the nodes representing relationships between the respective actors. Thereafter, a particular node in the sociograph corresponding to an information connector node between at least two distinct groups of the nodes in the sociograph is identified. A particular actor of the plurality of actors associated with the particular node is then classified as an information connector between at least two sub-networks of the actors of the online social network service.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method comprising: accessing an electronic sociograph depicting a plurality of actors of an online social network service as nodes in the sociograph, the sociograph including edges between the nodes representing relationships between the respective actors; identifying, by a machine including a memory and at least one processor and based on a network topology of the sociograph, a particular node in the sociograph corresponding to an information connector node between at least two distinct groups of the nodes in the sociograph including a first group of nodes and a second group of nodes; and classifying a particular actor of the plurality of actors associated with the particular node as an information connector between at least two sub-networks of the actors of the online social network service, based on the network topology of the sociograph. 2. The method of claim 1, wherein the identifying further comprises: determining that the particular node is directly connected to at least one node in the first group and at least one node in the second group. 3. The method of claim 1, wherein the identifying further comprises: determining that a threshold portion of nodes in the first group have no direct connection to each node in the second group, and wherein the particular node is not included in the second group. 4. The method of claim 1, wherein the identifying further comprises: determining that a predetermined portion of nodes in the first group have at least a threshold number of connections to other nodes in the first group. 5. The method of claim 1, wherein the identifying further comprises: determining that removal of the particular node from the sociograph results in no direct connection between the first and second group of nodes. 6. The method of claim 1, wherein the classifying further comprises: annotating a node in the sociograph corresponding to the particular actor with information indicating that the particular actor is classified as the information connector. 7. The method of claim 1, further comprising: identifying a content item that has been posted by the information connector or that has received a social interaction signal from the information connector; determining that a source of the content item is an actor included in a first group of actors corresponding to the first group of nodes; and displaying information describing at least one of the content item and the social interaction signal in a content feed viewable by a second group of actors corresponding to the second group of nodes. 8. The method of claim 7, further comprising: determining that the content item has been disseminated by at least a predetermined portion of actors in the first group of actors corresponding to the first group of nodes. 9. A system comprising: a machine including a memory and at least one processor; a sociograph module configured to access an electronic sociograph depicting a plurality of actors of an online social network service as nodes in the sociograph, the sociograph including edges between the nodes representing relationships between the respective actors; and a leadership module, executable by the machine, configured to: identify, based on a network topology of the sociograph, a particular node in the sociograph corresponding to an information connector node between at least two distinct groups of the nodes in the sociograph including a first group of nodes and a second group of nodes; and classify a particular actor of the plurality of actors associated with the particular node as an information connector between at least two sub-networks of the actors of the online social network service, based on the network topology of the sociograph. 10. The system of claim 9, wherein the leadership module is further configured to: determine that the particular node is directly connected to at least one node in the first group and at least one node in the second group. 11. The system of claim 9, wherein the leadership module is further configured to: determine that a threshold portion of nodes in the first group have no direct connection to each node in the second group, and wherein the particular node is not included in the second group. 12. The system of claim 9, wherein the leadership module is further configured to: determine that removal of the particular node from the sociograph results in no direct connection between the first and second group of nodes. 13. The system of claim 9, wherein the leadership module is further configured to: identify a content item that has been posted by the information connector or that has received a social interaction signal from the information connector; determine that a source of the content item is an actor included in a first group of actors corresponding to the first group of nodes; and display information describing at least one of the content item and the social interaction signal in a content feed viewable by a second group of actors corresponding to the second group of nodes. 14. The system of claim 13, wherein the leadership module is further configured to: determine that the content item has been disseminated by at least a predetermined portion of actors in the first group of actors corresponding to the first group of nodes. 15. 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 an electronic sociograph depicting a plurality of actors of an online social network service as nodes in the sociograph, the sociograph including edges between the nodes representing relationships between the respective actors; identifying, by a machine including a memory and at least one processor and based on a network topology of the sociograph, a particular node in the sociograph corresponding to an information connector node between at least two distinct groups of the nodes in the sociograph including a first group of nodes and a second group of nodes; and classifying a particular actor of the plurality of actors associated with the particular node as an information connector between at least two sub-networks of the actors of the online social network service, based on the network topology of the sociograph. 16. The storage medium of claim 15, wherein the identifying further comprises: determining that the particular node is directly connected to at least one node in the first group and at least one node in the second group. 17. The storage medium of claim 15, wherein the identifying further comprises: determining that a threshold portion of nodes in the first group have no direct connection to each node in the second group, and wherein the particular node is not included in the second group. 18. The storage medium of claim 15, wherein the identifying further comprises: determining that removal of the particular node from the sociograph results in no direct connection between the first and second group of nodes. 19. The storage medium of claim 15, wherein the operations further comprise: identifying a content item that has been posted by the information connector or that has received a social interaction signal from the information connector; determining that a source of the content item is an actor included in a first group of actors corresponding to the first group of nodes; and displaying information describing at least one of the content item and the social interaction signal in a content feed viewable by a second group of actors corresponding to the second group of nodes. 20. The storage medium of claim 19, wherein the operations further comprise: determining that the content item has been disseminated by at least a predetermined portion of actors in the first group of actors corresponding to the first group of nodes.