Conversation so far:
What happened in 1967 for the The Mamas & the Papas?
By June 1967, the strain on the group was apparent when it performed indifferently at the Monterey International Pop Festival
What was the issue for The Mamas & the Papas at the Monterey International Pop Festival in 1967?
The band was under-rehearsed

Question: Did they start to practice more together after that?
Self-contained rewrite: Did The Mamas and the Papas start to practice more together after  their under-reheared performance at the Monterey International Pop Festival in 1967?