Complex sentence: From there she moved to London where she was a member Lucy Wertheim's' Twenties Group' and of the avant-garde London Group, from 1937-39 she lived in New York.
Split into simpler sentences: From there she moved to London where she was a member Lucy Wertheim's' Twenties Group' and of the avant-garde London Group. From 1937-39 she lived in New York.