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 was mentor to the man whose works, along with those of Alban Berg, were included in the studio album entitled At the Grave of Richard Wagner?" whose answer is Arnold Schoenberg.
Each document should contain about 30 words, and these documents should contain useful information.

Query: mentor of Alban Berg
Useful Output:

Doc 1: Read about Alban Berg's family background, childhood aspiration as a poet and his study under Arnold Schoenberg.
Doc 2: Alban Maria Johannes Berg was an Austrian composer. He was a member of the Second Viennese School with Arnold Schoenberg and Anton Webern.
Doc 3: Schoenberg for six years until 1911. Berg admired him as a composer and mentor, and they remained close lifelong friends. Berg may have seen the
Doc 4: Alban Berg (1885–1935), one of the most influential composers of  mentor and a lifelong influence. This apprenticeship marked the
Doc 5: Thus began a complicated teacher–student relationship that ended only with Berg's death. He studied formally with Schoenberg for seven years