Clusters can be passive.Logical formLearned from2 sentences. A submergence can be passive.Logical formLearned from2 sentences. (Health risks) may be associated with passive smoking.Logical formLearned from2 sentences. A house can be passive.Logical formLearned from2 sentences. An agency can be passive.Logical formLearned from2 sentences. An outsider can be passive.Logical formLearned from2 sentences. Constraints can be passive.Logical formLearned from2 sentences. Migrants can be passive.Logical formLearned from2 sentences. An identity can be passive.Logical formLearned from2 sentences. Updates can be passive.Logical formLearned from2 sentences. A (stereo projection system) can be passive.Logical formLearned from2 sentences. A (data connection) can be passive.Logical formLearned from2 sentences. Some passive monitoring can be effective.Logical formLearned from2 sentences. A passive voice may use words.Logical formLearned from2 sentences. Passive attacks may use sniffers.Logical formLearned from2 sentences.