A king may undergo a (death mask).Logical formLearned from7 sentences. A face may be covered by an (oxygen mask).Logical formLearned from7 sentences. A mask may be forced on a person.Logical formLearned from7 sentences. Residents may wear (face masks).Logical formLearned from7 sentences. Some persons may wear (face masks).Logical formLearned from7 sentences. Protective masks may undergo a production.Logical formLearned from7 sentences. A (gas mask) can be black.Logical formLearned from7 sentences. Sales may pertain-to masks.Logical formLearned from7 sentences. Persons can be in masks.Logical formLearned from7 sentences. A male may buy a mask.Logical formLearned from7 sentences. Surgical masks can be protective.Logical formLearned from7 sentences. Persons may need masks.Logical formLearned from7 sentences. Persons may scurry for (gas masks).Logical formLearned from7 sentences. A mask may pertain-to a painter.Logical formLearned from7 sentences. Masks may pertain-to a country.Logical formLearned from7 sentences.