Complex sentence: While her parents were touring Annie May was placed in a convent school in New Jersey in 1897 aged six, and around the end of 1903 joined with her parents to form the Busch Devere Trio which was active until 1912.
Split into simpler sentences: While her parents were touring, 6-year-old Annie May was placed in a convent school in New Jersey. At 12 at the end of 1903, she joined her parents as the Busch Devere Trio, which was active until 1912.