Table: deepwater_navigator
Columns: name
type
entered_service
water_depth
location

Question: Which is located in Angola and entered service in 1988?
SQL: SELECT "name" FROM deepwater_navigator WHERE "location" = 'angola' AND "entered_service" = '1988'

Question: What type entered service in 2000?
SQL: SELECT "type" FROM deepwater_navigator WHERE "entered_service" = '2000'

Question: What is the water depth of Sedco 702, located in Nigeria?
SQL: SELECT "water_depth" FROM deepwater_navigator WHERE "location" = 'nigeria' AND "name" = 'sedco 702'

Question: Which is located in Nigeria?
SQL: SELECT "name" FROM deepwater_navigator WHERE "location" = 'nigeria'

Question: Which type entered service in 1976/1997 and is located in Brazil?
SQL: SELECT "type" FROM deepwater_navigator WHERE "location" = 'brazil' AND "entered_service" = '1976/1997'

Question: Where is Transocean Richardson, a semi entered into service in 1988?
SQL: SELECT "location" FROM deepwater_navigator WHERE "type" = 'semi' AND "entered_service" = '1988' AND "name" = 'transocean richardson'