Original: George Herbert Leigh Mallory (18 June 1886 - 8\/9 June 1924) was an English mountaineer who took part in the first three British expeditions to Mount Everest in the early 1920s.
Simplified: George Herbert Leigh Mallory (June 18, 1886 - June 8\/June 9 1924) was a British mountaineer who took part in three expeditions to Mount Everest in the early 1920's.