SN4 ""

No	Pattern	Freq
1	[verb] a [noun sg] to the problem	33
2	[prep] a [noun sg] to the problem	25
3	[prep] a [noun sg] to the problem	25
4	as a [noun sg] to the problem	15
5	as a [noun sg] to the problem	15
6	find a [noun sg] to the problem	12
7	[to-vb] a [noun sg] to the problem	12
8	[vb infin] a [noun sg] to the problem	8
9	provide a [noun sg] to the problem	7
10	[adv] a [noun sg] to the problem	7
11	to find a [noun sg] to the problem	7
12	for a [noun sg] to the problem	6
13	for a [noun sg] to the problem	6
14	a [adj] [noun sg] to the problem	106
15	a [adj] [noun sg] to the problem	96
16	a [num ord] [noun sg] to the problem	6
17	a [noun sg] to the [adj] problem	18
18	a [noun sg] to the [adj] problem	17
19	a [noun sg] to the [noun sg] problem	10
20	a [noun sg] to the [noun] problem	10
21	a [noun sg] to the problem [prep]	37
22	a [noun sg] to the problem [prep]	37
23	a [noun sg] to the problem of	34
24	a [noun sg] to the problem of	34
25	a [noun sg] to the problem [verb]	9
26	a [noun sg] to the problem [pron]	5