A (trade growth) can be sustained.Logical formLearned from6 sentences. An execution can be sustained.Logical formLearned from6 sentences. A collapse can be sustained.Logical formLearned from6 sentences. An (artillery barrage) can be sustained.Logical formLearned from6 sentences. A group can be sustained.Logical formLearned from6 sentences. A correspondence can be sustained.Logical formLearned from6 sentences. (Hurricane winds) can be sustained.Logical formLearned from6 sentences. (Gale-force winds) can be sustained.Logical formLearned from6 sentences. A patronage can be sustained.Logical formLearned from6 sentences. A hum can be sustained.Logical formLearned from6 sentences. A (rate limit) can be sustained.Logical formLearned from6 sentences. A sustained release can be constituted-of-or-filled-with energy.Logical formLearned from6 sentences. A (chain reaction) can be sustained.Logical formLearned from6 sentences. A harvest can be sustained.Logical formLearned from6 sentences. Careers can be sustained.Logical formLearned from6 sentences.