Task: Question Answering
Input (English): We then evaluate the ranks of the target entities $t$ with the commonly used mean rank (MR), mean reciprocal rank (MRR), as well as Hits@1, Hits@3, and Hits@10. 
 Question: what was the evaluation metrics studied in this work?
Output (English): mean rank (MR), mean reciprocal rank (MRR), as well as Hits@1, Hits@3, and Hits@10