Question: What years did Bernard Leach have a student named Peter Stichbury?
Paraphrase: Peter Stichbury spent what years as Bernard Leaches' student?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2898210 p:P802 ?s . ?s ps:P802 wd:Q16089985 . ?s pq:P585 ?value}