Complex sentence: The band frequently toured alongside A&M labelmates (and label founder) Herb Alpert and the Tijuana Brass, no doubt providing plenty of opportunity for Hall and Herb Alpert to get acquainted; she would leave Brasil' 66 in 1971, but marry Alpert in 1973.
Split into simpler sentences: The band frequently toured alongside A&M labelmates (and label founder) Herb Alpert and the Tijuana Brass, no doubt providing plenty of opportunity for Hall and Herb Alpert to get acquainted. She would leave Brasil' 66 in 1971, but marry Alpert in 1973.