Table 4.

Distribution of annotation discrepancies among the semantic labels

Types of representation discrepancies	Frequency (%, N = 28)
Different syntactically but equivalent semantically	28.6
Implied past tense	21.4
Discrepancies caused by differences in segmentation	17.9
Implied duration	10.7
Error in rater’s understanding of criterion’s meaning	10.7
Event vs. Relative Time Interval to represent treatment period	3.6
Incorrect Allen temporal relation (before vs. finishes)	3.6
Relative Time Interval vs. Range Duration for 1–2 weeks	3.6