Persons can be in masks.Logical formLearned from48 sentences. Masks can be painted.Logical formLearned from48 sentences. A mask can be plastic.Logical formLearned from48 sentences. (Gas masks) may pertain-to persons.Logical formLearned from48 sentences. A side may pertain-to a mask.Logical formLearned from47 sentences. A mask can be expressionless.Logical formLearned from47 sentences. Faces may be covered by masks.Logical formLearned from47 sentences. Gunmen can be in (ski masks).Logical formLearned from46 sentences. Thousands can be constituted-of-or-filled-with (gas masks).Logical formLearned from46 sentences. A (face mask) can be protective.Logical formLearned from45 sentences. A mask can be in place.Logical formLearned from45 sentences. Masks can be over mouths.Logical formLearned from44 sentences. A mask can be painted.Logical formLearned from44 sentences. A mask can be nasal.Logical formLearned from44 sentences. A person may remove a mask.Logical formLearned from44 sentences.