Conversation so far:
What year did Porcupine Tree form?
Porcupine Tree originated in 1987.
Who was their inspiration?
Partially inspired by the psychedelic/progressive bands of the 1970s, such as Pink Floyd.
Did they cover any of their songs?
CANNOTANSWER.
Did they win any awards?
CANNOTANSWER.
What is something crazy they did?
The two fabricated a detailed back-story including information on alleged band members and album titles, as well as a "colourful" history.
What was their "colourful" history story?
purportedly included events such as a meeting at a 1970s rock festival and several trips in and out of prison.

Question: How many people originally were in the band?
Self-contained rewrite: How many people originally were in the Porcupine Tree band?