Some kongers may wear surgical masks.Logical formLearned from5 sentences. Persons may wear (ski masks).Logical formLearned from5 sentences. Dozens can be constituted-of-or-filled-with (gas mask distribution centers).Logical formLearned from5 sentences. A (gas mask) can be improved.Logical formLearned from5 sentences. Oil can be without masks.Logical formLearned from5 sentences. An (oxygen mask) may be pressed to a face.Logical formLearned from5 sentences. Masks may protect workers.Logical formLearned from5 sentences. An audience may put_on (gas masks).Logical formLearned from5 sentences. A US-president may remove a mask by rule_outing cooperation.Logical formLearned from5 sentences. Masks can be flimsy.Logical formLearned from5 sentences. Humor can be a mask.Logical formLearned from5 sentences. Firefighters can be without (gas masks).Logical formLearned from5 sentences. Black masks can be around necks.Logical formLearned from5 sentences. (Gas masks) can be with (plastic extensions).Logical formLearned from5 sentences. Kits may include (gas masks).Logical formLearned from5 sentences.