Complex sentence: Le Ahn Sisters first appeared at the Beachcomber in New York July 2,1940, which drew a lawsuit from Heidt, who claimed that, under a contract signed October 13,1938, they were bound exclusively to him for five-years.
Split into simpler sentences: Le Ahn Sisters first appeared at the Beachcomber in New York July 2,1940. The engagement drew a lawsuit from Heidt, who claimed that, under a contract signed October 13,1938, they were bound exclusively to him for five-years.