SN4 ""

No	Pattern	Freq
1	[noun] which have been	994
2	[noun pl] which have been	844
3	[noun sg] which have been	123
4	[prep] which have been	116
5	[prep] which have been	116
6	of which have been	112
7	of which have been	112
8	[adj] which have been	46
9	[det] which have been	38
10	those which have been	35
11	those which have been	35
12	[conj] which have been	32
13	[coord] which have been	32
14	and which have been	24
15	and which have been	24
16	[noun prp] which have been	14
17	[n mass] which have been	13
18	item which have been	11
19	items which have been	11
20	issues which have been	10
21	module which have been	10
22	area which have been	10
23	factors which have been	10
24	factor which have been	10
25	issue which have been	10
26	modules which have been	9
27	books which have been	9
28	book which have been	9
29	areas which have been	9
30	[verb] which have been	9