Task: Question Answering
Input (English): We ensemble BERT and E-BERT by (a) mean-pooling their outputs (AVG) or (b) concatenating the entity and its name with a slash symbol (CONCAT), e.g.: Jean_Marais / Jean Mara ##is. 
 Question: What are the two ways of ensembling BERT and E-BERT?
Output (English): mean-pooling their outputs (AVG) concatenating the entity and its name with a slash symbol (CONCAT)