What is the Class IB flammable liquid with the highest electric dipole moment whose safety classification and labelling is NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response ?
select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2201 ?obj . ?ent wdt:P4952 wd:Q51139288 } ORDER BY DESC(?obj)LIMIT 5 
class ib flammable liquid: Q21009055 nfpa 704: standard system for the identification of the hazards of materials for emergency response: Q51139288