Question: Gol Transportes Aéreos is the second largest Brazilian airline company by market share after the company that merged with LAN Airlines on which date?
Sentence (from "Gol Transportes Aéreos"): According to the National Civil Aviation Agency of Brazil (ANAC), between January and December 2015 Gol had 35.9% of the domestic and 13.6% of the international market shares in terms of passengers per kilometer flown, making it the largest low-cost airline in South America and the second largest Brazilian airline company by market share and fleet size, after LATAM Brasil.
Relevant evidence: Yes