(Track roller derby leagues) can be flat.Logical formLearned from6 sentences. A derby of a season may take place.Logical formLearned from6 sentences. A derby can be dull.Logical formLearned from6 sentences. A derby may pertain-to a musician.Logical formLearned from6 sentences. An entry can be in a derby.Logical formLearned from6 sentences. A (demolition derby) can be with a (monster truck).Logical formLearned from6 sentences. A (home run derby) may pertain-to a male.Logical formLearned from6 sentences. Some derbies can be in some years.Logical formLearned from6 sentences. A (derby game) can be 2-2.Logical formLearned from6 sentences. A (derby clash) can be with a country.Logical formLearned from6 sentences. A (derby clash) may pertain-to week.Logical formLearned from6 sentences. A defender may miss a derby.Logical formLearned from6 sentences. A (firm derby) may pertain-to week.Logical formLearned from6 sentences. A derby can be tempestuous.Logical formLearned from6 sentences. A winner may win a derby.Logical formLearned from6 sentences.