Question: When did Soong Ching-ling step down as the President of the PRC?
Paraphrase: At what point was Soong Ching-ling no longer PRC President?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q17132 p:P39 ?s . ?s ps:P39 wd:Q553169 . ?s pq:P582 ?value}