What is end time and start time of Boeing 747 has operator as Air Algérie ?
SELECT ?value1 ?value2 WHERE { wd:Q2494 p:P793 ?s . ?s ps:P793 wd:Q41463697 . ?s pq:P276 ?value1 . ?s pq:P748 ?value2 }
benedict xvi: Q2494 priestly ordination in the roman rite of the catholic church: Q41463697