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: "when was air india and indian airlines merged?" whose answer is 26 February 2011.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was air india and indian airlines merged
Useful Output:

Doc 1: In 2007, the Government of India announced that Indian Airlines would be merged into Air India Limited as its wholly owned subsidiary.  India announced the
Doc 2: Praful Patel, the aviation minister who led the Air India-Indian Airlines merger in 2007, has been keeping a low profile since a pilot
Doc 3: The merger was approved in 2007 and the merged body was called the National Aviation Company of India Limited (NACIL). The merger was initiated with the aim of
Doc 4: Post-merger Air India will operate over 5,600 weekly flights  In 2006-07, while then government-run Indian Airlines was merged
Doc 5: Air India and Indian Airlines were merged under Air India Limited in 2007. On 27 January 2022 Tata group purchased Air India again from the