user: Question: Where is Transocean Richardson, a semi entered into service in 1988?
Columns: ['Name', 'Type', 'Entered service', 'Water depth', 'Location']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Deepwater Navigator', 'ship', '2000', 'ft (m)', 'Brazil']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Type" = 'semi' AND "Entered service" = '1988' AND "Name" = 'Transocean Richardson';