Complex sentence: Jones spent time growing up in London, Berlin, and Vevey, Switzerland, where he attended the first and second grade at the Commonwealth American School (now the International School of Lausanne) in Lausanne.
Split into simpler sentences: Jones spent time growing up in London, Berlin, and Vevey. He attended the first and second grade at the Commonwealth American School (now the International School of Lausanne) in Lausanne.