What is {safety classification and labelling} of {polymer of} of {polyvinyl chloride} ?
Is polyvinyl chloride safe?
Is polyvinyl chloride safe?
SELECT ?j WHERE { resource:polyvinyl_chloride property:polymer_of ?k . ?k property:safety_classification_and_labelling ?j }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q146368> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4600>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?X . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?X. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4952> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . }
SELECT ?answer WHERE { wd:Q146368 wdt:P4600 ?X . ?X wdt:P4952 ?answer}
NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response