Filters can be open.Logical formLearned from12 sentences. A filter can be broadband.Logical formLearned from12 sentences. A standard may act as a filter.Logical formLearned from12 sentences. Filters may be required.Logical formLearned from12 sentences. Sites may be blocked by filters.Logical formLearned from12 sentences. A filter may be needed.Logical formLearned from12 sentences. A length may pertain-to a filter.Logical formLearned from12 sentences. (Air filters) may be changed.Logical formLearned from12 sentences. A filter may pertain-to a us-state.Logical formLearned from12 sentences. A filter can be against rays.Logical formLearned from12 sentences. Filters can be quality.Logical formLearned from11 sentences. Filters may be implemented.Logical formLearned from11 sentences. A filter may pertain-to a choice.Logical formLearned from11 sentences. Filters can be symmetric.Logical formLearned from11 sentences. A filter can be dynamic.Logical formLearned from11 sentences.