You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "British Asia Airways is a subsidiary of an airline with its main hub in which airport ?" whose answer is London Heathrow Airport.
Each document should contain about 30 words, and these documents should contain useful information.

Query: British Asia Airways parent company and main hub
Useful Output:

Doc 1: British Asia Airways (IATA: BR / ICAO: BAW) was an airline headquartered in Taipei, Taiwan operating from 1993 to 2002.
Doc 2: In 1993, British Airways launched a new subsidiary carrier called British Asia Airways. The airline was based in Taiwan and operated a single route.
Doc 3: British Airways has scrapped plans to create a low-cost subsidiary based at Gatwick airport after a pilots' union failed to support the proposal.
Doc 4: British Airways parent company IAG will invest up to €200m (£168.1m) in tech startups through a new venture capital arm.
Doc 5: British Asia Airways Limited was a subsidiary of British Airways founded due to the legal status of the Republic of China (Taiwan) and territory disputes