A person may clean a filter.Logical formLearned from11 sentences. Filters can be global.Logical formLearned from11 sentences. A maker can be constituted-of-or-filled-with (cigarette filters).Logical formLearned from11 sentences. Filters may undergo a performance.Logical formLearned from11 sentences. (Furnace filters) may pertain-to a person.Logical formLearned from11 sentences. A filter can be wide.Logical formLearned from11 sentences. A person may listen to a filter.Logical formLearned from11 sentences. Filters can be tools.Logical formLearned from11 sentences. A filter may undergo construction.Logical formLearned from11 sentences. A filter can be porous.Logical formLearned from11 sentences. A filter can be global.Logical formLearned from11 sentences. A filter may help.Logical formLearned from11 sentences. A person may put a filter.Logical formLearned from11 sentences. Filters may be created.Logical formLearned from11 sentences. Filters may be used.Logical formLearned from11 sentences.