Read this: Until the 1990s further replays would be played until one team was victorious. Some ties took as many as six matches to settle; in their 1975 campaign, Fulham played a total of 12 games over six rounds, which remains the most games played by a team to reach a final. Replays were traditionally played three or four days after the original game, but from 1991–92 they were staged at least 10 days later on police advice. This led to penalty shoot-outs being introduced, the first of which came on 26 November 1991 when Rotherham United eliminated Scunthorpe United.

When was the last penalty shoot-out?
What is the answer? (If it cannot be answered, return "unanswerable")
unanswerable