What is the {group of chemical substances} with the {MAX(ultimate tensile strength)} whose {instance of} is {group of chemical substances}  ?
Chemicals from what class/group has the largest tensile strength?
What group or class of chemicals has the greatest tensile strength?
SELECT ?s WHERE { ?s property:ultimate_tensile_strength ?h . ?s rdf:type ontology:group_or_class_of_chemical_substances . ?s rdf:type ontology:group_or_class_of_chemical_substances }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q17339814>.

?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/P5479>.
?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/P31> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q17339814> .

}
ORDER BY DESC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q17339814 . ?ent wdt:P5479 ?obj . ?ent wdt:P31 wd:Q17339814 } ORDER BY DESC(?obj)LIMIT 5 
nylon