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How did the band members of Aerosmith meet?
Before Aerosmith, Steven Tyler formed his own band called the Strangeurs—later Chain Reaction—in Yonkers, New York. Meanwhile, Perry and Hamilton formed the Jam Band, which was based on free-form

Question: When did the two bands meet?
Self-contained rewrite: When did the two bands Chain Reaction and Jam Band meet to form Aerosmith?