A challenge may lie.Logical formLearned from240 sentences. A challenge can be international.Logical formLearned from238 sentences. A person may like challenges.Logical formLearned from238 sentences. Persons may address challenges.Logical formLearned from236 sentences. A challenge can be sustained.Logical formLearned from234 sentences. Challenges can be weekly.Logical formLearned from232 sentences. Challenges may require choices.Logical formLearned from232 sentences. Challenges may be met.Logical formLearned from231 sentences. A person may love challenges.Logical formLearned from230 sentences. A challenge can be democratic.Logical formLearned from230 sentences. A challenge can be clumsy.Logical formLearned from229 sentences. A person can be ready for a challenge.Logical formLearned from228 sentences. A challenge may end.Logical formLearned from228 sentences. A challenge can be formal.Logical formLearned from227 sentences. A challenge can be great.Logical formLearned from224 sentences.