HN user
I don't think so. Freebase became Google Knowledge Graph and I suspect the technology underneath is basically abandoned inside Google at this point. A pity, I think the 2008 version would still be the fastest and most compact graph database available today.
As the designer of MQL (Metaweb/Freebase's query language) which is a GraphQL like language on top of a graph database, I'm always surprised by other graph query languages. Since JSON represents a tree easily, it a natural model for non-cyclic queries.
Using JSON for the template also leads to a clear correspondence between the query and the result which is a very nice property few query languages have.
http://mql.freebaseapps.com/ch03.html
to take trip back to 2007.