Original sentence: In 1974, the new look was to replace the previous look which had been going in one form or another for seven years.The Striped 2 was an ident used by BBC2 between 28 December 1974 and June 1979
Edited sentence: In 1974, the new look was to replace the previous look which had been going in one form or another for seven years, a long time for a television ident.The Striped 2 was an ident used by BBC Two between 28 December 1974 and June 1979