Figure 1. Multiplex networks consist of a set of nodes connected by different types of links.

(a) In the MMOG dataset, six types of social links co-exist between players, representing their friendship or enmity status, exchange of messages, trading activity, aggressive acts (attacks), and their placing of head-money (bounties) on others as a means of punishment. (b) Each player of the MMOG Pardus chooses a male (circles) or female (squares) gender when joining the game (adapted from http://www.pardus.at).