a inhibitor is used to sail up the sail of a physical ethanol
sailboats has not mast sailboats has mast fore_and_aft_sail is sail. fore_and_aft_sail is not sail. refining_weapons_grade_uranium is intelligent_agent_activity. refining_weapons_grade_uranium is not intelligent_agent_activity. sailboats has sails press_of_sail is not sail. press_of_sail is sail. spanker is not fore_and_aft_sail.