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: "CF Industries Holdings, Inc. is a North American manufacturer and distributor of agricultural fertilizers, based in Deerfield, Illinois, for its first,of how many year, it was a federation of regional agricultural supply cooperatives, a co-operative federation or secondary co-operative is a co-operative in which all members are, in turn, co-operatives?" whose answer is 56.
Each document should contain about 30 words, and these documents should contain useful information.

Query: history of CF Industries Holdings as a cooperative federation
Useful Output:

Doc 1: We were founded in 1946 as a fertilizer brokerage operation by a group of regional agricultural cooperatives seeking to pool their purchasing power. During the
Doc 2: Company History. We were founded in 1946 as a fertilizer brokerage operation by a group of regional agricultural cooperatives. During the
Doc 3: CF Industries was founded in 1946 as a fertilizer brokerage operation called Central Farmers Fertilizer Co. (CFFC) by a group of regional
Doc 4: The Cooperative Movement began in the 19th century as a response to the Industrial Revolution, protecting the rights, lives, and livelihoods of blue-collar
Doc 5: We are one of the largest manufacturers and distributors of nitrogen fertilizer and other nitrogen products in the world. Our principal customers are