Question: What is {end time} and {start time} of {{Boeing 747} has {operator} as {Air Algérie}} ?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q2494 p:P793 ?s . ?s ps:P793 wd:Q41463697 . ?s pq:P276 ?value1 . ?s pq:P748 ?value2 }