claim: Parkinson's disease causes muscle contractions.
evidence: Rosi Speiser -LRB- born 24 November 1951 in Bolsterlang -RRB- is a German former alpine skier who competed in the 1972 Winter Olympics .. Bolsterlang. Bolsterlang. German. Germany. alpine skier. Alpine skiing. 1972 Winter Olympics. 1972 Winter Olympics. She finished fifth in the slalom event .