Table 4.

Characteristics of annotation processes for 9 users for Random Sampling (PL) and Cost-CAUSE (AL) in each 120-minute annotation

User	Method	Number of sentences	F1	Entities per sentence	Words per sentence	Entity words per sentence	Entity density	Time	Words per minute
User1	PL	920	0.79	1.40	11.37	2.97	0.26	119.97	87.16
	AL	664	0.71	2.06	12.80	4.39	0.34	120.22	70.71
User2	PL	553	0.77	1.44	11.48	2.98	0.26	119.41	53.18
	AL	415	0.72	2.17	12.33	4.50	0.36	120.64	42.43
User3	PL	766	0.79	1.34	10.73	2.74	0.26	119.88	68.58
	AL	525	0.71	1.98	12.16	3.95	0.32	120.19	53.13
User4	PL	842	0.82	1.42	11.64	3.03	0.26	119.56	81.97
	AL	550	0.74	2.38	14.47	4.78	0.33	120.44	66.10
User5	PL	910	0.83	1.43	12.15	3.12	0.26	119.85	92.22
	AL	616	0.78	2.44	14.29	4.88	0.34	120.44	73.07
User6	PL	745	0.80	1.41	11.51	2.99	0.26	120.01	71.44
	AL	570	0.74	2.06	11.20	4.32	0.39	120.22	53.11
User7	PL	435	0.75	1.27	11.11	2.63	0.24	119.46	40.47
	AL	388	0.78	1.86	10.26	3.42	0.33	120.56	33.01
User8	PL	875	0.79	1.38	10.95	2.81	0.26	119.95	79.89
	AL	637	0.77	2.00	11.90	3.83	0.32	120.10	63.10
User9	PL	617	0.84	1.44	11.45	2.93	0.26	120.23	58.77
	AL	445	0.78	2.28	12.52	4.69	0.37	120.04	46.42

Abbreviations: AL, active learning; PL, passive learning.