 Complete the following phrase:  The 198788 FA Cup was the 107th season of the worlds oldest knockout football competition, The Football Association Challenge Cup, or FA Cup for short. The competition was won by Wimbledon F.C.s Crazy Gang who defeated league champions Liverpool through a headed goal by Lawrie Sanchez, thus denying Liverpool the double. They would be one of three clubs other than Manchester United, Arsenal, Chelsea and Liverpool to win the trophy in the following 20 years the others being Everton and Tottenham Hotspur before Portsmouths victory in the 