  Progress in language and image understanding by machines has sparkled the
interest of the research community in more open-ended, holistic tasks, and
refueled an old AI dream of building intelligent machines. We discuss a few
prominent challenges that characterize such holistic tasks and argue for
"question answering about images" as a particular appealing instance of such a
holistic task. In particular, we point out that it is a version of a Turing
Test that is likely to be more robust to over-interpretations and contrast it
with tasks like grounding and generation of descriptions. Finally, we discuss
tools to measure progress in this field.
