SN4 ""

No	Pattern	Freq
1	[adj] [noun pl] is that	404
2	main [noun pl] is [that]	18
3	other [noun pl] is [that]	16
4	[adj] problems is [that]	9
5	important [noun pl] is [that]	9
6	recent [noun pl] is [that]	8
7	[adj] schemes is [that]	8
8	[adj] terms is [that]	8
9	[adj] years is [that]	7
10	[adj] things is [that]	6
11	social [noun pl] is [that]	6
12	[adj] points is [that]	6
13	[adj] accounts is [that]	6
14	[adj] systems is [that]	6
15	major [noun pl] is [that]	5
16	great [noun pl] is [that]	5
17	new [noun pl] is [that]	5
18	large [noun pl] is [that]	5
19	[adj] sources is [that]	5
20	[adj] approaches is [that]	5