Complex sentence: Like almost every other pop group in the country, the band's outlook was profoundly altered by the cataclysmic Australian tour by The Beatles in June 1964, and their visit had a particular impact in Adelaide, because many recent migrants from Britain had settled there.
Split into simpler sentences: Like almost every other pop group in the country, the band's outlook was profoundly altered by the epoch-making Australian tour by The Beatles in June 1964. Their visit had a particular impact in Adelaide, because many recent migrants from Britain had settled there.