An (oxide mask) can be nitrous.Logical formLearned from4 sentences. Masks may be carven from wood.Logical formLearned from4 sentences. A mask may be supplied.Logical formLearned from4 sentences. A result can be subject to a mask.Logical formLearned from4 sentences. An alternative can be to a (mask condition).Logical formLearned from4 sentences. Mask can be by a female.Logical formLearned from4 sentences. Openings can be in a mask.Logical formLearned from4 sentences. A (delivery system) can be capable of permitting positive pressure.Logical formLearned from4 sentences. An end may pertain-to a mask.Logical formLearned from4 sentences. An (integer mask) may be interpreted.Logical formLearned from4 sentences. Protective masks can be necessary.Logical formLearned from4 sentences. Actors can be in masks.Logical formLearned from4 sentences. A mask may pertain-to a woman.Logical formLearned from4 sentences. A (face mask) may be made from an (animal bladder).Logical formLearned from4 sentences. (Face masks) may decrease an amount of (waste anesthetic gases).Logical formLearned from4 sentences.