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 the samsung galaxy s8 plus come out?" whose answer is on 21 April 2017.
Each document should contain about 30 words, and these documents should contain useful information.

Query: release date of Samsung Galaxy S8 Plus
Useful Output:

Doc 1: It launched on Friday, April 21 2017. Looking for that elusive unlocked Samsung Galaxy S8 Plus in the US? It costs around $460 on Amazon if you
Doc 2: Series: Galaxy S8 Plus; Release Date: June, 2017 ; Screen size: 6.2 inches (~84.0% screen-to-body ratio); Type: Super AMOLED capacitive
Doc 3: On Wednesday, Samsung unveiled its newest flagship phones, the Galaxy S8 and the Galaxy S8 Plus, pinning hopes on the flashy new launch and upcoming big-budget
Doc 4: Samsung will open pre-orders for both phones on April 10th – just under two weeks after their unveiling. The Galaxy S8 and Galaxy S8 Plus will then go on sale
Doc 5: Samsung has now confirmed the release date: 21 April for the US, and 28 April for the rest of the world (including the UK) - although it hasn't given specific