Task: Question Answering
Input (English): The bacteria Escherichia coli (E. coli) live in the intestines of humans and make vitamins such as vitamin K and B-complex vitamins. Which would best describe the relationship between E. coli and humans?  
 (A) The E. coli benefit and humans are harmed. (B) There is only a benefit for the humans. (C) There is only a benefit for the E. coli. (D) The E. coli and humans both benefit.
Output (English): D