A (shopping spree) can be sustained.Logical formLearned from5 sentences. Humor can be sustained.Logical formLearned from5 sentences. A joke can be sustained.Logical formLearned from5 sentences. (Missile attacks) can be sustained.Logical formLearned from5 sentences. A fiscal stimulus can be sustained.Logical formLearned from5 sentences. Depth can be sustained.Logical formLearned from5 sentences. Hits can be sustained.Logical formLearned from5 sentences. (Market rallies) can be sustained.Logical formLearned from5 sentences. A (scoring drive) can be sustained.Logical formLearned from5 sentences. A vibrancy can be sustained.Logical formLearned from5 sentences. A (product growth) can be sustained.Logical formLearned from5 sentences. A dry weather can be sustained.Logical formLearned from5 sentences. A nature of a crisis may require sustained action.Logical formLearned from5 sentences. An aggressiveness can be sustained.Logical formLearned from5 sentences. (Bombing campaigns) can be sustained.Logical formLearned from5 sentences.