Volunteers may wear masks.Logical formLearned from10 sentences. A female may wear a protective mask.Logical formLearned from10 sentences. A man can be in a (gas mask).Logical formLearned from10 sentences. Residents may wear masks.Logical formLearned from10 sentences. A male may say through an (oxygen mask).Logical formLearned from10 sentences. A resort may wear masks.Logical formLearned from10 sentences. Snipers may wear (ski masks).Logical formLearned from10 sentences. A (ski mask) can be blue.Logical formLearned from10 sentences. Soldiers may wear black masks.Logical formLearned from10 sentences. Police can be in masks.Logical formLearned from10 sentences. Soldiers can be in surgical masks.Logical formLearned from10 sentences. Some casualty may be covered by an (oxygen mask).Logical formLearned from10 sentences. A person may drop a mask.Logical formLearned from10 sentences. Protective masks may be discarded on the ground.Logical formLearned from10 sentences. (Commando teams) can be in (ski masks).Logical formLearned from10 sentences.