A role can be in a system.Logical formLearned from159 sentences. A role can be established.Logical formLearned from159 sentences. Roles can be powerful.Logical formLearned from158 sentences. A role can be in a defeat.Logical formLearned from158 sentences. A role can be in the (world economy).Logical formLearned from158 sentences. A role may evolve.Logical formLearned from158 sentences. A political-leader may play a role.Logical formLearned from158 sentences. Everyone may play a role.Logical formLearned from158 sentences. A male may enjoy a role.Logical formLearned from158 sentences. A role can be in the future.Logical formLearned from158 sentences. A role can be in the global economy.Logical formLearned from158 sentences. A role may pertain-to a mother.Logical formLearned from157 sentences. Roles can be known.Logical formLearned from157 sentences. A role can be a role.Logical formLearned from156 sentences. A government-agency may have a role.Logical formLearned from156 sentences.