Question: Bethnal Green is a station in what rail network established in 2007?
Sentence (from "Bethnal Green railway station"): Bethnal Green is a London Overground station in the district of Bethnal Green, East London, on the Lea Valley Lines network 1 mi down-line from London Liverpool Street; the next station down-line is either (for services to and from ) or (for services to and from and ).
Relevant evidence: Yes