Q:

What are possible values of 'relationship' field returned from Facebook Graph API /me/family query?

Can't seem to find it in the docs or here.  Starting to think this list does not exist.
I'm looking for a complete list of (or a way of generating such a list) possible values that can be returned in the 'relationship' field of Facebook Graph API queries like this:
https://graph.facebook.com/me/family?access_token=ACCESS_TOKEN
(You will of course need to supply your own ACCESS_TOKEN to see the results of such a query.  The API explorer is good for that kind of thing - https://developers.facebook.com/tools/explorer/).

A:

As described here - 

relationship -- A string describing the type of relationship. Can be one of parent, mother, father, sibling, sister, brother, child, son, daughter.

