Complex sentence: Nancy Swain Overton (born February 6,1926; died April 5,2009) first formed a singing group with her sister Jean Swain and two college friends, Bix Brent and Pauli Skindlov in 1946.
Split into simpler sentences: Nancy Swain Overton (February 6,1926-April 5,2009) was an American singer. Overton first formed a singing group with her sister Jean Swain and two college friends, Bix Brent and Pauli Skindlov in 1946.