A (title challenge) can be sustained.Logical formLearned from26 sentences. An economic downturn can be sustained.Logical formLearned from26 sentences. An economy can be sustained.Logical formLearned from25 sentences. An accomplishment can be sustained.Logical formLearned from25 sentences. (Hurricane force winds) can be sustained.Logical formLearned from25 sentences. Responses can be sustained.Logical formLearned from25 sentences. A round can be sustained.Logical formLearned from25 sentences. A vigilance can be sustained.Logical formLearned from25 sentences. A pitch can be sustained.Logical formLearned from25 sentences. A line can be sustained.Logical formLearned from25 sentences. A beating can be sustained.Logical formLearned from25 sentences. An artillery can be sustained.Logical formLearned from25 sentences. An initiative can be sustained.Logical formLearned from25 sentences. A run-up can be sustained.Logical formLearned from25 sentences. An uncertainty can be sustained.Logical formLearned from25 sentences.