SN4 ""

No	Pattern	Freq
1	[noun] is to ensure that	163
2	[noun sg] is to ensure that	140
3	aim is to ensure that	21
4	aim is to ensure that	20
5	[noun pl] is to ensure that	18
6	[adj] is to ensure that	16
7	[verb] is to ensure that	10
8	[det] is to ensure that	9
9	this is to ensure that	8
10	this is to ensure that	8
11	[pron] is to ensure that	7
12	concern is to ensure that	7
13	[vb infin] is to ensure that	7
14	concern is to ensure that	6
15	do is to ensure that	6
16	job is to ensure that	5
17	role is to ensure that	5
18	responsibility is to ensure that	5
19	job is to ensure that	5
20	responsibility is to ensure that	5
21	role is to ensure that	5
22	[num] is to ensure that	5
23	objective is to ensure that	5
24	step is to ensure that	5
25	do is to ensure that	5
26	objective is to ensure that	5
27	step is to ensure that	5
28	is [adj] to ensure that	86
29	is [adj] to ensure that	85
30	is [verb] to ensure that	82