Table 1. F-scores for clusters obtained through four different methods.

(A) Comparisons between 4, 4, 6 and 4 clusters
	$C_1(4)$	$C_2(4)$	$C_3(6)$	$C_4(4)$
$C_1(4)$	1	0.8566	0.7006	0.7736
$C_2(4)$		1	0.5857	0.8579
$C_3(6)$			1	0.6010
$C_4(6)$				1