2 These pairs are then grouped together into four different groups: timex-timex (T-T), event-DCT (E-D), event-timex (E-T) and event-event (E-E).
3 we assign a label whenever a temporal preposition establishes a dependency path between an event (E) and a timex (T), in which T acts as the temporal modifier of E. For example, if T is introduced by a temporal prepositions expressing a STARTTIME sense such as from or since, the relation is labelled as BEGUN BY.