  In recent years, large neural networks for natural language generation (NLG)
have made leaps and bounds in their ability to generate fluent text. However,
the tasks of evaluating quality differences between NLG systems and
understanding how humans perceive the generated text remain both crucial and
difficult. In this system demonstration, we present Real or Fake Text (RoFT), a
website that tackles both of these challenges by inviting users to try their
hand at detecting machine-generated text in a variety of domains. We introduce
a novel evaluation task based on detecting the boundary at which a text passage
that starts off human-written transitions to being machine-generated. We show
preliminary results of using RoFT to evaluate detection of machine-generated
news articles.
