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: "Ray Anderson was the first person to go 15 rounds against the pro boxer who fought in what two weight classes?" whose answer is light heavyweight and heavyweight.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Bob Foster weight classes boxer
Useful Output:

Doc 1:  boxing is divided into weight classes for fair competition, rock music has its own variations, each carrying its signature power and emotion
Doc 2: Bob Foster was a string bean light heavyweight who hit like a freight train. He was the uncontested light heavy champ and ruled that division
Doc 3: Bob Foster, hard-hitting 1960s and 70s light heavyweight king who fought out of Albuquerque, New Mexico and retired with a record of 56-8-1 with 46 knockouts.
Doc 4: Bob Foster weighed 40 pounds less than Muhammad Ali. 50 years ago, in front of less than 2000 fans in a tiny ballroom hotel,
Doc 5: He was the world light-heavyweight champion from 1968 to 1974, untouchable, unbeatable at the weight and unable to gain more than 13 pounds when