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 first car phone come out?" whose answer is 1946.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the first car phone invented
Useful Output:

Doc 1: The car phone was first introduced in America by Motorola in 1946 with limited service in Chicago provided by the Bell System.
Doc 2: This service originated in 1946 with the Bell System. The original equipment used for such a task weighed in at about 80 pounds (36 kg) well
Doc 3: The first known phone call from a car in America was on June 17, 1946, in St. Louis, Missouri. The network quickly spread to 25 cities, with six
Doc 4: Then, in 1973, Martin Cooper conceived the first handheld mobile phone (distinct from the car phone) in 1973 and led the team that developed it
Doc 5: The first ever call on a car phone in the UK happened in Lymm in Cheshire in 1959. The historic moment was captured by the BBC.