Complex sentence: The Refugee Relief Act of 1953 was an act of legislation passed by the 83rd United States Congress to replace the Displaced Persons Act of 1948, which expired at the end of 1952.
Split into simpler sentences: The Refugee Relief Act of 1953 was an act of legislation passed by the 83rd United States Congress. It was the United States's second refugee admissions and resettlement law, following the Displaced Persons Act of 1948, which expired at the end of 1952.