Table 1:

Abstract multi-document summarization on DUC 2007 with 95% confidence intervals.

System	ROUGE-1	ROUGE-2	ROUGE-L	BLEU-4	Repetition
T5 (ZSL)	21.21 (20.37 – 22.04)	4.35 (3.82 – 4.91)	11.59 (11.17 – 12.03)	1.45 (1.24 – 1.73)	33.21 (31.82 – 34.60)
T5 (FSL)	36.35 (34.96 – 37.66)	9.12 (8.27 – 9.94)	17.46 (16.85 – 18.10)	4.81 (4.22 – 5.51)	54.20 (52.27 – 56.24)
BART (ZSL)	37.36 (36.18 – 38.59)	8.08 (7.34 – 8.88)	16.62 (16.08 – 17.18)	5.14 (4.52 – 5.84)	44.91 (44.05 – 45.83)
BART (FSL)	40.86 (39.84 – 41.81)	9.40 (8.69 – 10.08)	18.38 (17.93 – 18.85)	6.06 (5.46 – 6.68)	53.96 (53.17 – 54.69)
PEGASUS (ZSL)	26.36 (25.05 – 27.64)	5.01 (4.38 – 5.70)	14.69 (13.95 – 15.34)	2.18 (1.83 – 2.58)	65.52 (60.81 −70.36)
PEGASUS (FSL)	36.02 (34.63 – 37.33)	7.95 (7.26 – 8.65)	18.88 (18.27 – 19.49)	5.21 (4.57 – 5.85)	74.29 (71.73 – 76.92)