sentences: a inhibitor is used to sail up the sail of a physical ethanol
docs: fore_and_aft_sail is sail. making_sails is intelligent_agent_activity. spanker is fore_and_aft_sail. balloon_sail is sail. sailboats has mast press_of_sail is sail. sailboats has sails head_sail is sail. refining_weapons_grade_uranium is intelligent_agent_activity. staysail is fore_and_aft_sail.