Complex sentence: Layton Kor (born 1938 in Canby, Minnesota) was an American rock climber of the 1960s, whose first ascents and drive for climbing are well known in the climbing world.
Split into simpler sentences: Layton Kor (born 1938 in Canby, Minnesota) is an American rock climber known for his climbs of the 1960s, which included many important first ascents. His drive for climbing was well known in the climbing world.