Sentence 1: Astronomer and UFO researcher Jacques Vallee and the director of the Goddard Space Flight Center Edward Weiler also participated in TGS .
Sentence 2: Astronomer and UFO researcher Jacques Vallee and the director of Goddard Space Flight Center Edward Weiler also attended TGS .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?