SN4 ""

No	Pattern	Freq
1	[noun] to the problem	452
2	[noun sg] to the problem	396
3	solution to the problem	201
4	solution to the problem	176
5	[verb] to the problem	102
6	approach to the problem	70
7	approach to the problem	61
8	answer to the problem	60
9	[noun pl] to the problem	55
10	answer to the problem	55
11	[vb pp] to the problem	32
12	[adv] to the problem	29
13	response to the problem	28
14	solutions to the problem	25
15	[adj] to the problem	23
16	response to the problem	22
17	[adj] to the problem	22
18	add to the problem	18
19	[adv] to the problem	16
20	attention to the problem	15
21	attention to the problem	15
22	[vb -s] to the problem	15
23	[vb infin] to the problem	14
24	[v-ing] to the problem	14
25	contribute to the problem	12
26	[pron] to the problem	12
27	[adv prt] to the problem	12
28	[vb base] to the problem	10
29	relate to the problem	9
30	[vb past] to the problem	9