This simple heuristic was errorful, but did tend to find completions beginning with and or or (1 below) and wh-questions followed by an NP or PP phrase that is grammatically coherent with the end of the question (2 and 3): (1) FEMALE: The driving range.
the feature F0 MIN for a conversation side was computed by taking the F0 min of each turn in that conversation side (not counting zero values of F0), and then averaging these values over all turns in the side.