 Complete the following phrase:  Williams reached the semi-final of the World Snooker Championship three times, losing to John Spencer in 1969, in 1972 to Alex Higgins 3031 having been four frames ahead with five left to play and, in 1974, 715 to Graham Miles. He never won a World Championship match at the Crucible Theatre after it became the World Snooker Championships venue in 1977, despite playing at the venue on eight occasions a record he shares with Cliff Wilson. He recovered from 82 down to win 98 against Terry Griffiths in the first round of the 1978 UK Championship, in the 