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 did they move the field goal back?" whose answer is 1927.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when were the field goal positions moved in football
Useful Output:

Doc 1: Looking for a breakdown of all 22 players on the football field? Check out this guide to learn the basics of American football positions.
Doc 2: In 1966 the NFL moved the goalposts again. The moved the posts off the goal line and stated they should be 20 feet tall. The following year,
Doc 3: Our professional coaches take look at the role of a number 10 in the modern game, which players do it best and why a team would play one.
Doc 4: On field goal attempts, they must line up head to head with the O-line. D-Linemen are not allowed to stunt except when in scrimmage kick
Doc 5: Use this Cheat Sheet to get to know the lingo and the players of American football, not to mention common NFL penalties to watch for.