Question: At what point in time did Baltimore have a population of 622,104 people?
Paraphrase: When was the population of Baltimore 622,104?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q5092 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '622104')) . ?s pq:P585 ?value}