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 is season 7 of once upon a time coming on tv?" whose answer is October 6, 2017.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did season 7 of once upon a time air
Useful Output:

Doc 1: ABC's fairy tale drama will be saying goodbye after the current seventh season, led by Lana Parrilla, Colin O'Donoghue and Robert Carlyle, later this year.
Doc 2: The show had always planned for six seasons, and so they wrapped up at the end of Season 6. They had a late renewal of Season 7 but had started
Doc 3: The sixth season finale of "Once Upon A Time" dropped a few hints at the show's giant reset in season seven.
Doc 4: Once Upon a Time was renewed for a seventh season on May 11, 2017, with ABC ordering 22 episodes. At Comic-Con 2017, ABC confirmed that the show
Doc 5: Well the season 7 is clearly a sum up of how OUAT has fallen to pieces, much to my sadness. I mean, there is so much plot holes, useless persona