Social Network Analysis

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I would like to know if there is any features in Sage to analise social networks like:

Social Network Analysis

Drawing on Mathematica's strong graph and network capabilities, Mathematica 9 introduces a complete and rich set of state-of-the art social network analysis functions. Access to social networks from a variety of sources, including directly from social media sites, and high level functions for community detection, cohesive groups, centrality, and similarity measures make performing network analysis tasks easier and more flexible than ever before.

I mean exactly anlysis of the real networks not graph theory.