SN4 ""

No	Pattern	Freq
1	[conj] it [is] [adv] known that	32
2	[coord] it [is] [adv] known that	17
3	[subord] it [is] [adv] known that	13
4	but it [is] [adv] known that	10
5	but it [is] [adv] known that	10
6	and it [is] [adv] known that	7
7	and it [is] [adv] known that	7
8	[noun] it [is] [adv] known that	6
9	[noun sg] it [is] [adv] known that	5
10	it [is] [adv] [adv] known that	19
11	it [is] [adv] [adv] known that	12
12	it [is] not [adv] known that	7
13	it [is] not [adv] known that	7
14	it [is] [not/n't] [adv] known that	7
15	it [is] [adv] [adv] known that	19
16	it [is] [adv] [adv] known that	19
17	it [is] [adv] well known that	11
18	it [is] [adv] well known that	11
19	it [is] [adv] known that [noun]	44
20	it [is] [adv] known that [art]	42
21	it [is] [adv] known that [art]	42
22	it [is] [adv] known that the	36
23	it [is] [adv] known that the	36
24	it [is] [adv] known that [adj]	33
25	it [is] [adv] known that [pron]	21
26	it [is] [adv] known that [noun pl]	19
27	it [is] [adv] known that [det]	17
28	it [is] [adv] known that [pers pn]	15
29	it [is] [adv] known that [noun sg]	14
30	it [is] [adv] known that [adj]	12