user: Question: What is the upstream with a 150 GB monthly cap?
Columns: ['Plan', 'Downstream', 'Upstream', 'Up:Down Ratio', 'Monthly Cap', 'Price']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Internet Popular', '512 kb/s', '256 kbit/s', 0.5, '10 GB', 'R$ 29,80']
SQL:

assistant: SELECT "Upstream" FROM "Table" WHERE "Monthly Cap" = '150 GB';