What is the {chemical compound} for {monomer of} of {polypropylene}
What is polypropylene's chemical monomer composition?
Which is the chemical monomer composition of polypropylene?
SELECT DISTINCT ?m WHERE { ?m property:monomer_of resource:polypropylene . ?m rdf:type ontology:chemical_compound }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4599> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q146174> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q11173> } 
 select distinct ?sbj where { ?sbj wdt:P4599 wd:Q146174 . ?sbj wdt:P31 wd:Q11173 } 
propylene