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: "The Y platform, or Y body, designation has been used twice by the General Motors Corporation, the first was for a group of entry-level compacts including the conventional front-engine compacts built by GM divisions Buick, Oldsmobile and Pontiac from 1961 to which year?" whose answer is 1963.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Y platform GM Buick Oldsmobile Pontiac end year
Useful Output:

Doc 1: The original entry-level front-engine compact car platform produced by General Motors from 1961 to 1963 by GM's subsidiaries Buick, Oldsmobile, and Pontiac.
Doc 2: GM Y Platform: General Motors, Compact car, Chevrolet Corvair, Buick, Oldsmobile  GM divisions Buick, Oldsmobile and Pontiac from 1961 to 1963. The second
Doc 3: GM introduced another new platform, the Y body, in 1961. Gm used the Y body for compacts like Oldsmobile Cutlass, Pontiac Tempest, and Buick
Doc 4: As a result, Oldsmobile was scrapped as mid-tier luxury was consolidated into Buick, and Pontiac was scrapped as performance was consolidated
Doc 5: Pontiac (axed 2010)  In mid-1920s the GM brand hierarchy was Chevrolet, Oakland, Oldsmobile, Buick, and Cadillac. With large price gaps opening