Parsey McParseface label map has 46 labels, some labels like mwe can not be find in either Universal Dependencies or Stanford typed dependencies Docs.
According to comments in code here:
This CoNLL reader is compatible with the CoNLL-U format described at http://universaldependencies.org/format.html
I'm a little confusing here, which format has been used in Syntaxnet / Parsey McParseface?