A portion may pertain-to a mask.Logical formLearned from13 sentences. A mask can be constituted-of-or-filled-with respectability.Logical formLearned from13 sentences. A mask can be bearded.Logical formLearned from13 sentences. Masks can be ugly.Logical formLearned from13 sentences. Persons may put on masks.Logical formLearned from13 sentences. A mask can be electronic.Logical formLearned from13 sentences. A base may pertain-to a mask.Logical formLearned from13 sentences. A mask may undergo wearings.Logical formLearned from13 sentences. A (signal mask) may pertain-to a process.Logical formLearned from13 sentences. A mask can be faceless.Logical formLearned from13 sentences. Masks can be in combination.Logical formLearned from13 sentences. A size may pertain-to a mask.Logical formLearned from13 sentences. A mask may be damaged.Logical formLearned from13 sentences. A surgical mask can be blue.Logical formLearned from13 sentences. (Health workers) can be in (face masks).Logical formLearned from13 sentences.