user: Question: What is the format of the album Pacific Ocean Blue in 1991?
Columns: ['Artist', 'Album', 'Country', 'Year', 'Catalog #', 'Format']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['The Beach Boys', 'L.A. (Light Album)', 'US', 1979.0, 'JZ 35752', 'LP']
SQL:

assistant: SELECT "Format" FROM "Table" WHERE "Album" = 'Pacific Ocean Blue' AND "Year" = 1991.0;