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 plays harmonica on when the levee breaks?" whose answer is Robert Plant.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who played harmonica on when the levee breaks
Useful Output:

Doc 1: When The Levee Breaks harmonica lesson - first solo. 1 of 3. Anna  Robert Plant and the Band of Joy playing "Somewhere Trouble Don't Go".
Doc 2: John Paul Jones has re-recorded the 1971 Led Zeppelin classic “When The Levee Breaks” with help from 17 musicians from around the globe.
Doc 3: The video also features appearances from guitarists Derek Trucks and Buffalo Nichols, drummer Stephen Perkins, harmonica player Ben Lee, singer
Doc 4: It always just assumed Plant was using a harmonica mic on Levee for an old school muffled swampy blues sound - with some phasing and probably
Doc 5: FEATURING: Alfredo Arce: Siku Flute Ben Lee: Harmonica Buffalo Nichols: Vocals, Guitar Davey Chegwidden: Dundun Drums