A rivalry can be fabled.Logical formLearned from9 sentences. A rivalry can be unofficial.Logical formLearned from9 sentences. A rivalry can be short-lived.Logical formLearned from9 sentences. A male may form a rivalry.Logical formLearned from9 sentences. Rivalries can be in a country.Logical formLearned from9 sentences. Rivalry may grow.Logical formLearned from9 sentences. Early years may pertain-to a rivalry.Logical formLearned from9 sentences. A family may be divided by a rivalry.Logical formLearned from9 sentences. Interest can be in a rivalry.Logical formLearned from9 sentences. A rivalry can be inherent.Logical formLearned from9 sentences. Rivalry can be for a presidency.Logical formLearned from9 sentences. A rivalry can be nationalistic.Logical formLearned from9 sentences. A rivalry can be regular.Logical formLearned from9 sentences. (Year rivalry) can be between coaches.Logical formLearned from9 sentences. Rivalries can be among ethnic groups.Logical formLearned from9 sentences.