Complex sentence: Before leaving for India, Carlin married Gertrude Maria Meredith Plath (who had been living in China with her aunt and uncle), on 20 April 1940, at Tientsin, although the couple would separate before the end of the war.
Split into simpler sentences: Before leaving for India, Carlin married Gertrude Maria Meredith Plath, who had been living in China with her aunt and uncle. The couple wed on 20 April 1940, at Tientsin, although they separated before the end of the war.