What is the {Boulton and Watt} for {discoverer or inventor} of {James Watt}
What did James Watt invent?
 select distinct ?sbj where { ?sbj wdt:P61 wd:Q9041 . ?sbj wdt:P31 wd:Q895118 } 
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P61> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q9041> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q895118> } 
What did James Watt concoct?