Follow the prior works BIBREF6, BIBREF7, BIBREF9, we adopt the BLEU and the Micro Entity F1 to evaluate our model performance.  We provide human evaluation on our framework and the compared models.  We hire several human experts and ask them to judge the quality of the responses according to correctness, fluency, and humanlikeness on a scale from 1 to 5. 
 Question: What were the evaluation metrics?
BLEU Micro Entity F1 quality of the responses according to correctness, fluency, and humanlikeness on a scale from 1 to 5