Complex sentence: Balsall Heath Baths were used as a makeshift hospital in the early years of World War II. An additional enterance was created to facilitate this purpose, which subsequently became one of the emergency exits from Pool 2.
Split into simpler sentences: Balsall Heath Baths were used as a makeshift hospital in the early years of World War II. An additional enterance was created to facilitate this purpose. This subsequently became one of the emergency exits from Pool 2.