Complex sentence: Peconic County is a proposed new county in New York that would consist of the easternmost portions of Suffolk County and would include the towns of East Hampton, Riverhead, Shelter Island, Southampton and Southold.
Split into simpler sentences: Peconic County is a proposed new county in New York. If created, it would consist of the easternmost portions of Suffolk County and would tentatively include the towns of East Hampton, Riverhead, Shelter Island, Southampton and Southold.