Our question taxonomy is derived from the UIUIC dataset (Li and Roth, 2002) which defines 6 coarse and 50 fine grain classes.
our set of question categories is formed by adopting 3 coarse classes: HUM (human), LOC (location), ENTY (entities) and replacing the NUM (numeric) coarse class with 3 fine-grain classes: CUR-RENCY, DATE, QUANTITY 2 .