which vessel area was called for on november 30, 1970
CREATE TABLE table_291768_1 (shipyard VARCHAR, commissioned VARCHAR)
SELECT shipyard FROM table_291768_1 WHERE commissioned = "November 30, 1970"
### Context: CREATE TABLE table_291768_1 (shipyard VARCHAR, commissioned VARCHAR) ### Question: which vessel area was called for on november 30, 1970 ### Answer: SELECT shipyard FROM table_291768_1 WHERE commissioned = "November 30, 1970"