Complex sentence: Sow stalls contain no bedding material and are instead floored with slatted plastic or metal to allow waste to be efficiently collected below, which is then flushed into open-air pits known as lagoons.
Split into simpler sentences: Sow stalls contain no bedding material and are instead floored with slatted plastic or metal to allow waste to be efficiently collected below. This waste is then flushed into open-air pits known as lagoons.