Complex sentence: The compilation debuted at No.26 in the UK album chart on Sep.2 2007, representing Starr's highest UK album chart peak since 1974, when the Goodnight Vienna LP debuted and peaked at No.30.
Split into simpler sentences: The compilation debuted at No.26 in the UK album chart on Sep.2 2007. This represents Starr's highest UK album chart peak since 1974, when the Goodnight Vienna LP debuted and peaked at No.30.