In Book 4, who does Hermione Granger go with to the Yule Ball?
Viktor Krum.
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> In Book 4, who does Hermione Granger go with to the Yule Ball? [/INST] Viktor Krum. </s>