(Std tests) may be doed.Logical formLearned from3 sentences. An increase can be in stds.Logical formLearned from3 sentences. A std may indicate that something-is-the-case.Logical formLearned from3 sentences. Stds may include chlamydia.Logical formLearned from3 sentences. Some stds may have symptoms.Logical formLearned from3 sentences. A std may kill a person.Logical formLearned from3 sentences. A female may contract a std.Logical formLearned from3 sentences. Persons can be stds.Logical formLearned from3 sentences. Some stds may show symptoms.Logical formLearned from3 sentences. Chlamydia can be a std.Logical formLearned from3 sentences. Stds may be listed.Logical formLearned from3 sentences. Persons may know about stds.Logical formLearned from3 sentences. Some stds may be covered.Logical formLearned from3 sentences. (Std rate charts) can be complicated.Logical formLearned from3 sentences. Persons may suffer from stds.Logical formLearned from3 sentences.