Complex sentence: They married on August 5,1943, and she moved with him to Guyana in December 1943; in Guyana, she took part in labour activism along with her husband and joined the British Guiana Labour Union.
Split into simpler sentences: They married on August 5,1943, and she moved with him to Guyana in December 1943. In Guyana, she took part in labour activism along with her husband and joined the British Guyanan Labour Union.