What is the time period that Michael Schumacher worked as a Formula One driver?
SELECT ?value1 ?value2 WHERE { wd:Q9671 p:P106 ?s . ?s ps:P106 wd:Q10841764 . ?s pq:P582 ?value1 . ?s pq:P580 ?value2 }
michael schumacher: Q9671 formula one driver: Q10841764