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 amazon echo plus come out?" whose answer is 31 October 2017.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Amazon Echo Plus release date
Useful Output:

Doc 1: The $150 Echo Plus has useful features including a built-in temperature sensor and smart home hub, but there are still better sounding speakers out there.
Doc 2: The second-gen Plus costs £140 in the UK and AU$229 in Australia. Right now, the expected ship date is Oct. 11 in all three countries.
Doc 3: 1st-gen: The company released the first Echo Plus in 2017. Its design was similar to the original Echo (they are difficult to tell apart at a
Doc 4: Announced on 20 September, the new Echo Plus is coming out on 11 October, but it's available to pre-order right now.
Doc 5: FCC approval date: 27 September 2017 (Est.) release date: 31 October 2017 (Est.) initial retail price (in USD): $150