What is the {astronomical observatory} for {operator} of {California Institute of Technology}
The Calif Inst of Technology uses what astronomical observatory?
who is the astronomical observatory for operator of California Institute of technology?
SELECT DISTINCT ?g WHERE { ?g property:operator resource:California_Institute_of_Technology . ?g rdf:type ontology:astronomical_observatory }
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/P137> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q161562> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1254933> } 
 select distinct ?sbj where { ?sbj wdt:P137 wd:Q161562 . ?sbj wdt:P31 wd:Q1254933 } 
Owens Valley Radio Observatory Palomar Observatory