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: "In what year was the band whose vocalist was in the original line up of the band "Morbid" formed?" whose answer is 1984.
Each document should contain about 30 words, and these documents should contain useful information.

Query: vocalist of Morbid
Useful Output:

Doc 1: David Vincent, the former frontman of death metal legends Morbid Angel. With a vocal prowess that seamlessly intertwined guttural growls with eerie melodic
Doc 2: The former Morbid Angel and current I Am Morbid frontman spoke to Jonathan Smith of Sonic Perspectives in a new interview.
Doc 3: Vincent left MORBID ANGEL in 2015. He has since been replaced by a returning Steve Tucker, who previously handled bass and vocals on MORBID
Doc 4: Vincent left MORBID ANGEL unvoluntarily in 2015. He has since been replaced by a returning Steve Tucker, who previously handled bass and vocals
Doc 5: After being dismissed from Morbid Angel last year, David Vincent has reappeared onstage performing an original country song 'Buyer Beware.'