Question: What sport became a Winter Olympic Games medal sport in 1976 and what Kati Winkler and her partner Rene Lohse competed twice in at the Winter Olympics, in 1998 and 2002?
Sentence (from "Snowboarding at the Winter Olympics"): Canadian Ross Rebagliati won the men's giant slalom and became the first athlete to win a gold medal in snowboarding.
Relevant evidence: No