Nurses may wear masks.Logical formLearned from5 sentences. Some (quarantine camps) may wear masks.Logical formLearned from5 sentences. A sea of masks may materialise.Logical formLearned from5 sentences. Residents may scramble for (gas masks).Logical formLearned from5 sentences. Masks can be in demand.Logical formLearned from5 sentences. A model may show a mask.Logical formLearned from5 sentences. Guerrillas may wear masks.Logical formLearned from5 sentences. Masks may pertain-to a company.Logical formLearned from5 sentences. Faces may be covered by (ski masks).Logical formLearned from5 sentences. Masks can be a choice.Logical formLearned from4 sentences. Masks can be in public places.Logical formLearned from4 sentences. Policemen may wear masks.Logical formLearned from4 sentences. Millions can be constituted-of-or-filled-with masks.Logical formLearned from4 sentences. Masks can be in a world-city.Logical formLearned from4 sentences. Persons may wear mask.Logical formLearned from4 sentences.