Before revision:  Our method is generally applicable and automatically learns to decompose questions of different classes , while matching the performance of decomposition methods that rely heavily on hand-engineering and annotation .
After revision:  Our method is generally applicable and automatically learns to decompose questions of different classes , while matching the utility of supervised and heuristic decomposition methods for QA and exceeding those methods in fluency. Qualitatively, we find that using sub-questions is promising for shedding light on why a QA system makes a prediction .