Task: Question Understanding
Input (English): GPT-2 achieves the highest score and the $n$-gram the lowest. Transformer-XL and the LSTM LM perform in the middle, and at roughly the same level as each other. We report the 12-category accuracy results for all models and human evaluation in Table TABREF14. 
 Question: What is the performance of the models on the tasks?
Output (English): Abstractive