Simplify and clean up grounding extractor
Simplify and clean up grounding extractor

bgyori/indra,johnbachman/belpy,sorgerlab/indra,johnbachman/indra,bgyori/indra,pvtodorov/indra,johnbachman/indra,johnbachman/indra,johnbachman/belpy,bgyori/indra,sorgerlab/belpy,sorgerlab/belpy,sorgerlab/indra,pvtodorov/indra,pvtodorov/indra,pvtodorov/indra,johnbachman/belpy,sorgerlab/belpy,sorgerlab/indra