I'm also seeing it in position 10. However in a scenario where this would be outranking another domain some things to consider:
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Facebook is a high authority site. That gives it a nice initial bump.
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The page appears to be liked some 500ish times. If a portion of the users who like that page have thier profiles set to public, google can see those internal links from thier pages to that page. Facebook does not no-follow internal links. So if a portion of the public pages linking in also have a decent amount of links going to thier page (ie they have a lot of friends on facebook or they've heavily linked to their facebook page from a decent blog or something like that) you get a ton of juice flowing into that page all with exact match anchor.
When we do reputation management for some of our clients we actively use some of these exact things to boost pages on social platforms but we learned the tactic from observing this as a natural phenomenon.

