Original sentence: Sheila Ferguson (born October 8 1947 in Philadelphia, Pennsylvania) was one of the longest serving singers of 1970s American female soul music group The Three Degrees
Edited sentence: Sheila Ferguson (born October 8 1947 in Philadelphia, Pennsylvania) was one of the longest serving singers of 1970s American female soul music group The Three Degrees, giving 20 years of wonderful service from 1966 until 1986