Question: What is the birthday of the racer who won both the Junior and Senior races in the 1969 Isle of Man TT?
Sentence (from "1969 Isle of Man TT"): German pairs won both sidecar events; Klaus Enders and Ralf Engelhardt in the 500 cc and Siegfried Schauzu and H.Schneider in the 750 cc.
Relevant evidence: No