In what year was the album “Demo ’91 ” released by Fear Factory?

In what year was the album “Demo ’91 ” released by Fear Factory?: The album “Demo ’91 ” was released in 1991 by Fear Factory, featuring 3 tracks.
What is the most successful song from the album “Demo ’91 ” by Fear Factory?: “Self Immolation” is the biggest hit from the album “Demo ’91 ” by Fear Factory.

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