Complex sentence: To write "Misty of Chincoteague", Henry flew to Chincoteague on Virginia's Eastern Shore in 1946 and began interviewing the residents of the rural island, including the Beebe family, who became the main characters in her "Misty of Chincoteague" series.
Split into simpler sentences: To write "Misty of Chincoteague", Henry flew to Chincoteague on Virginia's Eastern Shore in 1946 and began interviewing the residents of the rural island. It was there that Henry met the Beebe family, the main characters in her "Misty of Chincoteague" series.