Complex sentence: Located in Warren, Pennsylvania and built in 1883, the Struthers Library Theatre is the 18th oldest continuously operating legitimate theatre in the United States, and was listed on the National Register of Historic Places in 1975.
Split into simpler sentences: Located in Warren, Pennsylvania and built in 1883, the Struthers Library Theatre is the 18th oldest continuously operating legitimate theatre in the United States. It was later listed on the National Register of Historic Places, in 1975.