SN4 ""

No	Pattern	Freq
1	[noun] who had [adv] been [verb]	108
2	[noun pl] who had [adv] been [verb]	55
3	[noun sg] who had [adv] been [verb]	38
4	patient who had [adv] been [verb]	14
5	patients who had [adv] been [verb]	13
6	[pron] who had [adv] been [verb]	11
7	[adj] who had [adv] been [verb]	10
8	[indef pn] who had [adv] been [verb]	9
9	[det] who had [adv] been [verb]	8
10	[n mass] who had [adv] been [verb]	8
11	those who had [adv] been [verb]	7
12	people who had [adv] been [verb]	7
13	people who had [adv] been [verb]	7
14	those who had [adv] been [verb]	7
15	[noun prp] who had [adv] been [verb]	7
16	man who had [adv] been [verb]	6
17	[conj] who had [adv] been [verb]	6
18	[coord] who had [adv] been [verb]	5
19	girl who had [adv] been [verb]	5
20	who had [adv] [adv] been [verb]	14
21	who had [adv] [adv] been [verb]	9
22	who had [not/n't] [adv] been [verb]	5
23	who had not [adv] been [verb]	5
24	who had [adv] [adv] been [verb]	14
25	who had [adv] [adv] been [verb]	14
26	who had [adv] been [adj] [verb]	16
27	who had [adv] been [adj] [verb]	16
28	who had [adv] been [verb] [verb]	16
29	who had [adv] been [vb pp] [verb]	13
30	who had [adv] been able [verb]	8