SN4 ""

No	Pattern	Freq
1	[noun] who have been [verb] to	111
2	[noun pl] who have been [verb] to	51
3	[noun sg] who have been [verb] to	43
4	[adj] who have been [verb] to	19
5	of who have been [verb] to	12
6	[det] who have been [verb] to	12
7	[prep] who have been [verb] to	12
8	[prep] who have been [verb] to	12
9	of who have been [verb] to	12
10	those who have been [verb] to	11
11	those who have been [verb] to	11
12	[noun prp] who have been [verb] to	10
13	child who have been [verb] to	8
14	people who have been [verb] to	7
15	[indef pn] who have been [verb] to	7
16	children who have been [verb] to	7
17	[n mass] who have been [verb] to	7
18	people who have been [verb] to	7
19	[pron] who have been [verb] to	7
20	[num] who have been [verb] to	6
21	person who have been [verb] to	5
22	who [vb mod] have been [verb] to	7
23	who [modal v] have been [verb] to	7
24	who have [adv] been [verb] to	27
25	who have [adv] been [verb] to	19
26	who have not been [verb] to	8
27	who have [not/n't] been [verb] to	8
28	who have not been [verb] to	7
29	who have been [adv] [verb] to	10
30	who have been [adv] [verb] to	10