SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/ingredient> <http://dbpedia.org/resource/Acer_nigrum> }
acer nigrum is used in making what?
SELECT DISTINCT ?u WHERE { ?u property:ingredient resource:Acer_nigrum }
Maple syrup
[Maple syrup] has Acer nigrum as an ingridient.
[Maple syrup] has and ingredient called Acer nigrum.