I get what Ferrucci is saying about discounting the exact value of the category, although typically Final Jeopardy categories are more straightforward than Jeop

I get what Ferrucci is saying about discounting the exact value of the category, although typically Final Jeopardy categories are more straightforward than Jeopardy and Double Jeopardy categories and the machine should have been tuned for that. What surprises me is his explanation about that the lack of a clear subject in the text, such as "This US city...", made the question that much more difficult for Watson. My understanding is that Watson is specifically designed to answer Jeopardy questions (question Jeopardy answers?), which often only vaguely refer to a subject with "it" or "this." Based on its performance earlier in the game, I would have thought that Watson's NLP would have had little problem with the question.