try tgbugs rdflib

Author: satra

requirements.txt

@@ -6,7 +6,8 @@ python-dateutil>=2.2
 nibabel>=2.1.0
 future>=0.16.0
 simplejson>=3.8.0
-prov>=1.5.0
+https://github.com/tgbugs/rdflib/releases/download/v5.0.0-dev-tgbugs-b6/rdflib-5.0.0.dev0-py2.py3-none-any.whl
+prov
 click>=6.6.0
 funcsigs
 configparser