Complex sentence: Mark Stevens (December 13,1916--September 15,1994) was an American actor, one of four who played the lead role in the television series, "Martin Kane, Private Eye", which aired on NBC from 1949 to 1954.
Split into simpler sentences: Mark Stevens (December 13,1916--September 15,1994) was an American actor. He was among four actors to play the lead role in the television series, "Martin Kane, Private Eye", which aired on NBC from 1949 to 1954.