Question: Which is the taxon for the taxon source of milk?
Paraphrase: Give me the name of the taxon for the taxon source of milk.
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P1672 wd:Q8495 . ?sbj wdt:P31 wd:Q16521 } 
Answer: mammal, Ovis