How many {short-term exposure limit} are for {benzene} ?
The limit for short term exposure to benzene is what?
What is the short term exposure limit for benzene?
SELECT ( COUNT ( ?l ) AS ?d ) { resource:benzene property:short-term_exposure_limit ?l }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2270> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2407> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q2270 wdt:P2407 ?obj }
7