Social Icons Appear On The Knowledge Graph

I'm not even sure if this is new, but i've never seen this before: if applicable, the Knowledge Graph lists all available Social Icons. For +Kim Kardashian these are Twitter, Facebook, Google+ and MySpace. I can reproduce this for a few celebrities, both on Desktop and on Mobile.

ping +Mark Traphagen, +David Amerland, +Barry Schwartz 
Social Knowledge Graph
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