query: SELECT Name FROM ship WHERE Ship_ID NOT IN (SELECT Ship_ID FROM mission)
question: What the name of the ship that ain't involved in any mission?
query_toks: SELECT Name FROM ship WHERE Ship_ID NOT IN ( SELECT Ship_ID FROM mission )
query_toks_no_value: select name from ship where ship_id not in ( select ship_id from mission )
question_toks: What the name of the ship that ain't involved in any mission?