A person may have concerns.Logical formLearned from1 147 sentences. Security can be a concern.Logical formLearned from1 104 sentences. Concerns may pertain-to a world-city.Logical formLearned from1 095 sentences. Concerns can be about health.Logical formLearned from1 095 sentences. Concern can be in a country.Logical formLearned from1 079 sentences. Reason can be for concern.Logical formLearned from1 063 sentences. A concern can be renewed.Logical formLearned from1 047 sentences. Concerns can be strong.Logical formLearned from1 041 sentences. Concerns can be continued.Logical formLearned from1 022 sentences. Concerns can be persistent.Logical formLearned from1 002 sentences. Concerns can be practical.Logical formLearned from995 sentences. Concerns can be about security.Logical formLearned from988 sentences. A concern may pertain-to a government.Logical formLearned from947 sentences. A person may have some concerns.Logical formLearned from911 sentences. Concerns can be widespread.Logical formLearned from897 sentences.