Sentence 1: Huge fields along the zone were discovered in 1920 by Long Beach Oil Field and Huntington Beach Oil Field in 1921 .
Sentence 2: Huge fields along the zone were discovered at Huntington Beach Oil Field in 1920 , and the Long Beach Oil Field in 1921 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?