Task: Question Answering
Input (English): As we mention in the Section 2, CAEVO is the current state-of-the-art system for feature-based temporal event relation extraction BIBREF10 . It's widely used as the baseline for evaluating TB-Dense data. We adopt it as our baseline for evaluating CaTeRS and RED datasets. 
 Question: What were the traditional linguistic feature-based models?
Output (English): CAEVO