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 sings the theme song to rules of engagement?" whose answer is Señor Happy.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who sings the theme song to rules of engagement
Useful Output:

Doc 1: Stream How Many Ways (Theme From "Rules of Engagement") by Señor Happy on desktop and mobile. Play over 320 million tracks for free on
Doc 2: The opening theme of the show is called “How Many Ways” and is performed by Señor Happy, a musical group.
Doc 3: Senor Happy - How Many Ways (Rules of Engagment Theme Full Song) · Comments.
Doc 4: RULES OF ENGAGEMENT Theme Song(Lyric Video)|Popular Lyrics #rulesofengagement #abc · Comments.
Doc 5: "How Many Ways", a theme song of the television series Rules of Engagement by Señor Happy; "How Many Ways", a 2018 song by Keith Sweat · Disambiguation icon.