Question: Ammonium Cation has a lower flammable limit of 15.0, what is its conjugate base?
Paraphrase: Ammonium Cation has a lower flammable limit of 15.0, what is its conjugate base?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q190901 wdt:P4149 ?answer . ?answer wdt:P2202 ?x FILTER(contains(?x , '15.0'))}