Graql[1] is a (and stands for) graph query language. It is unusually expressive, allowing relationships to be members of other relationships[2] -- effectively, allowing one edge to be an endpoint of another edge. 

Someone named Felix posted a Haskell library for generating Graql queries[3].

Does anyone have a Haskell program that not only generates but uses such a query?

[1] https://hackage.haskell.org/package/graql

[2] https://discuss.grakn.ai/t/nested-relationships/

[3] https://discuss.grakn.ai/t/graql-haskell-how-to-run-the-test-program/