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: "who has the most aircraft in the world?" whose answer is American Airlines Group.
Each document should contain about 30 words, and these documents should contain useful information.

Query: top airlines by aircraft count
Useful Output:

Doc 1: Still, tied for largest fleet were Delta Air Lines and American Airlines, both in possession of 1006 aircraft. IndiGo led in aircraft orders
Doc 2: Etihad Airways, S7, and Frontier all operate 104 aircraft. Moreover, KLM and Air New Zealand, and SpiceJet operate 112 aircraft. And finally,
Doc 3: The Center For Aviation published a table with special data, listing the 20 largest airline groups in the world by aircraft fleet.
Doc 4: However, American Airlines is the largest airline in the world by fleet size (933 aircraft). American is headquartered in Fort Worth, Texas, and
Doc 5: The four US majors—American Airlines, Delta Air Lines, United Airlines and Southwest Airlines—continue to dominate the world's airline rankings