What is the {heterocyclic compound} with the {MAX(mass)} whose {has part} is {fluorine}  ?
Which fluorine-containing heterocyclic compound has the largest mass ?
select ?ent where { ?ent wdt:P31 wd:Q193430 . ?ent wdt:P2067 ?obj . ?ent wdt:P527 wd:Q650 } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q193430>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2067>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P527> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q650> .

}
ORDER BY DESC(?obj1)
LIMIT 5
Which heterocyclic compound contains fluorine and also has the largest mass?