Complex sentence: Juliette Gordon Low attempted in 1913 to merge her organization with the GSA with the groups similarities Low though would be easy, but Lisetor-Lane felt Low copycatted her organization and threatened a lawsuit.
Split into simpler sentences: Juliette Gordon Low attempted in 1913 to merge her organization with the GSA. With the groups similarities, Low thought this would be easy, but Lisetor-Lane felt Low copycatted her organization and threatened a lawsuit.