SN4 ""

No	Pattern	Freq
1	[verb] [art] problem of the	86
2	[prep] [art] problem of the	85
3	[prep] [art] problem of the	85
4	to [art] problem of the	33
5	to [art] problem of the	33
6	[to-vb] [art] problem of the	25
7	be [art] problem of the	21
8	[be] [art] problem of the	21
9	[conj] [art] problem of the	18
10	solve [art] problem of the	18
11	of [art] problem of the	17
12	[adv] [art] problem of the	17
13	of [art] problem of the	17
14	[vb -s] [art] problem of the	16
15	[vb past] [art] problem of the	16
16	[is] [art] problem of the	15
17	is [art] problem of the	14
18	[vb infin] [art] problem of the	14
19	[adv] [art] problem of the	13
20	with [art] problem of the	11
21	with [art] problem of the	11
22	[that] [art] problem of the	7
23	that [art] problem of the	7
24	[vb pp] [art] problem of the	7
25	that [art] problem of the	7
26	address [art] problem of the	7
27	[subord] [art] problem of the	6
28	to solve [art] problem of the	6
29	on [art] problem of the	6
30	also [art] problem of the	6