Complex sentence: In City's last game of the 1973--74 season against Manchester United at Old Trafford, Law's 81st-minute back-heeled goal gave City a 1--0 lead but, thinking his goal might relegate United, Law did not celebrate it.
Split into simpler sentences: In City's last game of the 1973--74 season against Manchester United at Old Trafford, Law's 81st-minute back-heeled goal gave City a 1--0 lead. Thinking his goal might relegate United, Law did not celebrate it.