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"): It also owns the brand Varig, although now that name refers to what is informally known as the "new" Varig, founded in 2006, not to the extinct "old" Varig airline, founded in 1927.
Relevant evidence: No