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: "John Will completed his blackbelt under one of these men, a brother renowned for his BJJ skills?" whose answer is Jean Jacques Machado.
Each document should contain about 30 words, and these documents should contain useful information.

Query: John Will blackbelt instructor
Useful Output:

Doc 1: This site is about Brazilian jiu jitsu (BJJ). I've trained since 2006: I'm a black belt, teaching and training at Artemis BJJ in Bristol, UK.
Doc 2: John B. Will, globetrotting martial arts instructor and scholar, discusses his travels through India in the 80's.
Doc 3: He was a Danzan Ryu Jiu Jitsu third degree black belt, but shortly after starting BJJ and getting dominated by your purple belt self, he
Doc 4:  Professor John Will One of the most influential Martial  Black Belt in that art, he founded BJJ Australia, the largest single
Doc 5: My only assumption is that they did since Peter is a black belt under Gracie Barra/Carlinhos and John Will is one under Rigan Machado, who was