Complex sentence: Bert Whalley (August 6,1913-February 6,1958) was a professional footballer for Manchester United from 1935 till 1946 he then became football coach for Manchester United until he died in the 1958 Munich air disaster, aged 44.
Split into simpler sentences: Bert Whalley (August 6,1913-February 6,1958) was a professional footballer for Manchester United from 1935 till 1946, later serving as coach for the club. He died in the 1958 Munich air disaster, aged 44.