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: "Leader II is a 1991 studio album by a glam rock singer who sold over how many records?" whose answer is 20 million.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Leader II 1991 album artist
Useful Output:

Doc 1: Gary Glitter – Leader II ; Country: Spain ; Released: 1993 ; Genre: Rock, Pop ; Style: Glam ; Credits. Written By – Gary Glitter and Mark Pearson
Doc 2: Gary Glitter – Leader II ; Country: UK ; Released: 1991 ; Genre: Rock, Pop ; Style: Glam, Pop Rock ; Notes. Original CD release - uses the artwork
Doc 3: here we have 'Leader II' GGs sixth studio album 1991. enjoy glitter fans.!!!
Doc 4: The album features several other chamber works by Al-Zand including his Six Bagatelles, with music inspired by the art of Robert Motherwell (1915–1991).
Doc 5: Leader II ; Ships from. Serendipity UnLtd ; Sold by. Serendipity UnLtd ; Returns. 30-day refund/replacement ; Number of discs, ‎1.