Complex sentence: Trevor Braham (born 22 April 1922), a prominent figure in Himalayan exploration and mountaineering, joined the Himalayan Club in 1946, the Swiss Alpine Club in 1948, and the Alpine Club in 1951.
Split into simpler sentences: Trevor Braham (born 22 April 1922), is a prominent figure in Himalayan exploration and mountaineering. Braham joined the Himalayan Club in 1946, the Swiss Alpine Club in 1948, and the Alpine Club in 1951.