What is the Class IB flammable liquid with the highest fusion enthalpy whose instance of is Class IB flammable liquid ?
select ?ent where { ?ent wdt:/instance of/ wd:/Class IB flammable liquid/ . ?ent wdt:/molar fusion enthalpy/ ?obj . ?ent wdt:/instance of/ wd:/Class IB flammable liquid/ } ORDER BY DESC(?obj)LIMIT 5 