Complex sentence: Anna Czerwińska (born on July 10,1949 in Warsaw)-Polish mountaineer, known for being the oldest woman to Summit Mount Everest (at the time) at the age of 50 (born 7/10/49 climbed Everest from Nepal side on 5/22/2000).
Split into simpler sentences: Anna Czerwińska (born on July 10,1949 in Warsaw)-Polish mountaineer. Anna known for being the oldest woman to Summit Everest (at the time) at the age of 50 (born 7/10/49 climbed Everest from Nepal side on 5/22/2000).