Table 1.

Data Statistics.

Entity Type	Instances	Average Span Length (word/instance)	Prevalence in EHR notes (%)	Prevalence in Sentences (%)
Bleeding event	10232	1.49	100.00	8.26
Bleeding anatomic site	3372	1.35	73.59	3.08
Suspected alternative cause	3622	1.59	79.98	3.32
Severity	3490	1.39	78.31	3.00
Medication	8726	1.01	99.81	6.52
Bleeding lab evaluation	3010	1.07	78.31	2.96