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: "who sang the theme to kelly's heroes?" whose answer is Mike Curb Congregation.
Each document should contain about 30 words, and these documents should contain useful information.

Query: theme song to Kelly's Heroes singer
Useful Output:

Doc 1: Written and orchestrated by the renowned composer-arranger-conductor and Mike Curb, the lament-filled lyrics of Burning Bridges offered a more
Doc 2: Theme song from Kelly's Heroes. Burning Bridges by the Mike Curb Congregation (1971). #thetvgenius #warmoviemusic #kellysheroes · Be Careful
Doc 3: Original Vinyl copy of "Burning Bridges" from the Kelly's Heroes Soundtrack from 1970. Mostly Composed by Lalo Schifrin, but this track was
Doc 4: Curb and Lalo Schifrin wrote “Burning Bridges,” the theme song for the 1970 movie Kelly’s Heroes. It was a #1 hit in New Zealand and South Africa.
Doc 5: Listen to Kelly's Heroes - Theme Song (Burning Bridges) by gray in 70s playlist online for free on SoundCloud.