text: The Elizabeth Islands extend off the southwestern part of this peninsula, which was the site of Marconi’s first trans-Atlantic radio transmitter.
full_question: The Elizabeth Islands extend off the southwestern part of this peninsula, which was the site of Marconi’s first trans-Atlantic radio transmitter. It contains the Race Point Light, Highland Light, and Nauset Light lighthouses. It also contains the towns of Yarmouth, Barnstable, Hyannis, and Provincetown. The islands of Martha’s Vineyard and Nantucket are off its southern shore. What is this peninsula, the southeastern part of Massachusetts?
first_sentence: The Elizabeth Islands extend off the southwestern part of this peninsula, which was the site of Marconi’s first trans-Atlantic radio transmitter.