Modify anaphoric relation

TU_current is calculated by modifying the interpretation of the previous temporal reference. The times differ in the filler of a field F, where F is at least as specific as time of day, but are consistent in all fields less specific than F. The resolvent contains the information in TU_previous that is less specific than Ftogether with the information in TU_current that is of the same or greater specificity as F. (See rule A-modify in Section 5.3.)

For example (see also (3)-(5) of the corpus example in Figure 1):

Utterance	Interpretation
Monday looks good.	Assume: Monday 19 August
How about 2?	(co-reference relation) 2pm, Monday 19 August
Hmm, how about 4?	(modify relation) 4pm, Monday 19 August