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 song iron man come out?" whose answer is 1970.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the song iron man come out
Useful Output:

Doc 1: OCTOBER 1971 (53 YEARS AGO) Black Sabbath: "Iron Man" b/w "Electric Funeral" (Warner Bros. 7530) 45 single is released in the US.
Doc 2: 'Iron Man' was based on Jesus Christ, the notion that he was a hero one minute and persecuted the next. But instead of forgiving his persecutors, in our song '
Doc 3: Sabbath released Iron Man as a single in 1971. Although it reached No.52 in America (nine places higher than Paranoid), in the UK it make no
Doc 4: October 1971. While the exact release date is murky, that was the month that Black Sabbath released "Iron Man" as a single in America.
Doc 5: It was released as a single in 1999 and was later included on the reissue of Kravitz's album '5'. Kravitz's cover reached No. 49 on the