Complex sentence: In 1931, Service Civil International sent a team of international volunteers to the Welsh colliery town of Bryn Mawr, the volunteers redeveloped a brownfield site into a public park, the new park include an outdoor swimming pool.
Split into simpler sentences: In 1931, Service Civil International sent a team of international volunteers to the Welsh colliery town of Brynmawr. The volunteers redeveloped a brownfield site into a public park, which included an outdoor swimming pool.