Sentence 1: In 1986 , he joined forces with Erich A. Colhoun to work together on the ANARE expedition , which founded the summer field base of Sir Edgeworth David in the Bunger Hills .
Sentence 2: In 1986 , he joined Edgeworth David to work together on the ANARE expedition that founded the summer field base of Sir Erich A. Colhoun in the Bunger Hills .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?