SN4 ""

No	Pattern	Freq
1	[noun] is that the [adj] [noun pl]	142
2	[noun sg] is that the [adj] [noun pl]	129
3	explanation is that the [adj] [noun]	15
4	explanation is [conj] the [adj] [noun pl]	7
5	explanation is [that] the [adj] [noun pl]	7
6	explanation is that the [adj] [noun pl]	7
7	explanation be that the [adj] [noun pl]	7
8	explanation is that the [adj] [noun pl]	7
9	explanation is that [art] [adj] [noun pl]	7
10	explanation [is] that the [adj] [noun pl]	7
11	explanation is that the [adj] [noun pl]	7
12	explanation is that [art] [adj] [noun pl]	7
13	explanation [be] that the [adj] [noun pl]	7