ValueError: not enough values to unpack (expected 2, got 1) #9

Hello, I have some questions to ask you. I am running to language_ Error reported on line 77 of the module. I think there is a problem with the shape of the answer because the shape of the answer only has one batch dimension. I would like to ask why the question text was embedded and tokenized when loading data, but the answer text did not perform these operations. Why are the returned "answer_id" and "answer" both answers_ id