SN4 ""

No	Pattern	Freq
1	[noun] is that [pron] [noun]	218
2	[noun sg] is that [pron] [noun]	169
3	[noun pl] is that [pron] [noun]	37
4	[verb] is that [pron] [noun]	35
5	[pron] is that [pron] [noun]	27
6	[pers pn] is that [pron] [noun]	21
7	[adj] is that [pron] [noun]	20
8	it is that [pron] [noun]	13
9	it is that [pron] [noun]	13
10	[noun prp] is that [pron] [noun]	11
11	[adv] is that [pron] [noun]	10
12	[adv] is that [pron] [noun]	10
13	problem is that [pron] [noun]	9
14	[adj] is that [pron] [noun]	9
15	[vb pp] is that [pron] [noun]	8
16	[vb infin] is that [pron] [noun]	8
17	problem is that [pron] [noun]	8
18	[vb -s] is that [pron] [noun]	6
19	[prep] is that [pron] [noun]	5
20	[num ord] is that [pron] [noun]	5
21	[prep] is that [pron] [noun]	5
22	[det] is that [pron] [noun]	5
23	[vb base] is that [pron] [noun]	5
24	here is that [pron] [noun]	5
25	reason is that [pron] [noun]	5
26	happen is that [pron] [noun]	5
27	answer is that [pron] [noun]	5
28	here is that [pron] [noun]	5
29	is [adj] that [pron] [noun]	181
30	is [adj] that [pron] [noun]	169