@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix time: <http://www.w3.org/2006/time#> .
@prefix prov: <http://www.w3.org/ns/prov-o/> .

# a way to represent composite PEs?

# Dcterms isPartOf, isPart

# FRBR partOf and part

# RO relation ontology has part of