SN4 ""

No	Pattern	Freq
1	[verb] [art] problem of [adv]	54
2	[prep] [art] problem of [adv]	40
3	[prep] [art] problem of [adv]	40
4	to [art] problem of [adv]	17
5	to [art] problem of [adv]	17
6	[vb -s] [art] problem of [adv]	15
7	with [art] problem of [adv]	14
8	with [art] problem of [adv]	14
9	solve [art] problem of [adv]	13
10	[adv] [art] problem of [adv]	11
11	be [art] problem of [adv]	10
12	[be] [art] problem of [adv]	10
13	[is] [art] problem of [adv]	9
14	[adv] [art] problem of [adv]	9
15	[v-ing] [art] problem of [adv]	8
16	[to-vb] [art] problem of [adv]	8
17	is [art] problem of [adv]	8
18	[vb infin] [art] problem of [adv]	8
19	[vb past] [art] problem of [adv]	7
20	[conj] [art] problem of [adv]	7
21	pose [art] problem of [adv]	5
22	[art] [adj] problem of [adv]	30
23	[art] [adj] problem of [adv]	28
24	[art] problem of [verb] [adv]	33
25	[art] problem of [v-ing] [adv]	33
26	[art] problem of [noun] [adv]	14
27	[art] problem of [noun sg] [adv]	12
28	[art] problem of [art] [adv]	8
29	[art] problem of [art] [adv]	8
30	[art] problem of the [adv]	7