Question: What's the name of the group that  Bacharach worked hands-on with, when rock and pop acts from Britain became popular in the United States
Sentence (from "British Invasion"): The British Invasion was a cultural phenomenon of the mid-1960s, when rock and pop music acts from the United Kingdom, as well as other aspects of British culture, became popular in the United States, and significant to rising "counterculture" on both sides of the Atlantic.
Relevant evidence: Yes