Claim: Puerto Rico is an island.
Evidence: It is an archipelago that includes the main island of Puerto Rico and a number of smaller ones such as Mona , Culebra , and Vieques.
An archipelago -LRB- -LSB- ɑːrkᵻˈpɛləɡoʊ -RSB- -RRB- , sometimes called an island group or island chain , is a chain , cluster or collection of islands.