Again, however, their approach does not make use of the theme/rheme distinction, and does not attempt to predict pitch accent type or edge tones; in addition, they report frequent errors on auxiliaries and negatives (e.g., no), which we have found to be important for highlighting trade-offs prosodically.
in brief, the idea behind the strategy is to select the top-ranked flight, along with any other highly ranked flights that offer a compelling trade-off-that is, a better value (for the user) on one of its attributes.