Note that the WikiWars corpus contains annotations in TIMEX2 format and that both HeidelTime and SUTime extract temporal expressions following TimeML's TIMEX3 tags.
a meaningful comparison is nevertheless possible as (i) many TIMEX values are identical in TIMEX2 and TIMEX3, (ii) some simple mappings from TIMEX3 to TIMEX2 are possible and we applied them for SUTime's and HeidelTime's output, and (iii) the other differences affect HeidelTime's and SUTime's evaluation results in the same manner.