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 was the last time we traveled to the moon?" whose answer is 11 December 1972.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the last time humans traveled to the moon
Useful Output:

Doc 1: Apollo 17 (December 7–19, 1972) was the eleventh and final mission of NASA's Apollo program, the sixth and most recent time humans have set foot on the Moon.
Doc 2: Apollo 17 was the sixth and final Apollo mission to make it to the Moon and the last time astronauts travelled there. Those astronauts were
Doc 3: Apollo 17, which took place from December 7 and 19, 1972, was the last human mission to the Moon. How many times has someone walked on the Moon?
Doc 4: So the last NASA astronauts lifted off from the moon on December 14, 1972, and they've never been back since. Pyle says that higher-ups in NASA
Doc 5: Apollo 11 lunar module as it returned from the surface of the Moon to dock with the command module on July 21, 1969. The image was taken by