CREATE TABLE table_name_54 (year_built VARCHAR, current_status VARCHAR, boat_builder VARCHAR)

What year did J. Jones, trearddur bay build a boat with a current status of tbsc?
SELECT year_built FROM table_name_54 WHERE current_status = "tbsc" AND boat_builder = "j. jones, trearddur bay"
SELECT "year_built" FROM "table_name_54" WHERE "boat_builder" = "j. jones, trearddur bay" AND "current_status" = "tbsc"