user: Question: with rank of 31 what is the year?
Columns: ['Rank', 'Name', 'Height feet(m)', 'Floors', 'Year']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['1', 'One America Plaza', '500 (152)', 34.0, 1991.0]
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Rank" = '31';