Task: Question Answering
Input (English): Context: Kneeling beside her silent form , he let his tongue travel the length of her neck , the blood there still sweet , but too dry , wrong . He growled . Her heart still throbbed , but it was pushing more venom than blood now . The girl twitched , brushing off the small purple flowers that sentimental fool of a vampire had left for her along with his gift of immortality . 
Question: Why would the bite hurt so much ?
Output (English): It was from the undead .