CREATE TABLE table_name_31 (location VARCHAR, name VARCHAR, type VARCHAR, entered_service VARCHAR)

Where is Transocean Richardson, a semi entered into service in 1988?
SELECT location FROM table_name_31 WHERE type = "semi" AND entered_service = "1988" AND name = "transocean richardson"
SELECT "location" FROM "table_name_31" WHERE "1988" = "entered_service" AND "name" = "transocean richardson" AND "semi" = "type"