Task: Question Understanding
Input (English): For each model, we examined word-level perplexity, R@3 in next-word prediction, latency (ms/q), and energy usage (mJ/q). To explore the perplexity-recall relationship, we collected individual perplexity and recall statistics for each sentence in the test set. 
 Question: What aspects have been compared between various language models?
Output (English): Abstractive