what is the {field of work} for {Stephen Hillenburg} has {employer} as {Ocean Institute} ?
What was Stephen Hillenburg's field of work when he was employed by the Ocean Institute?
SELECT ?value WHERE { wd:Q318750 p:P108 ?s . ?s ps:P108 wd:Q3348664 . ?s pq:P101 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q318750> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P108> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3348664> .
?statement <http://www.wikidata.org/entity/P101> ?value. 
} 

What job did Stephen Hillenburg have when he worked at the Ocean Institute?