Question: What is the density of Calcium Hydroxide at 20.0 degrees Celsius?
Paraphrase: Calcium Hydroxide has what density at 20 degrees Celsius?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q182849 p:P2054 ?s . ?s ps:P2054 ?obj . ?s pq:P2076 ?x filter(contains(?x , '20.0')) }