Question: How long has the airline, that joined Mesa Air Group to found Henan Airlines, been a member of Star Alliance?
Sentence (from "Air Midwest"): Besides initially flying as an independent air carrier, it later operated code sharing feeder flights on behalf of Eastern Air Lines as Eastern Air Midwest Express, on behalf of Trans World Airlines (TWA) as Trans World Express and on behalf of US Airways as US Airways Express.
Relevant evidence: No