Ted and consists of N + T nodes and M + T?N links, whereFig 2. An illustration of the ground nodes. There are four ground nodes in this network representing four topics. doi:10.1371/journal.pone.0158855.gPLOS ONE | DOI:10.1371/journal.pone.0158855 July 14,6 /Discover Influential LeadersN is the number of nodes, i.e users, M is the number of edges, and T is the number of topics. In addition, the we