SN4 ""

No	Pattern	Freq
1	[noun] [was/were] introduced [prep] the	166
2	[noun sg] [was/were] introduced [prep] the	94
3	[noun pl] [was/were] introduced [prep] the	56
4	[pron] [was/were] introduced [prep] the	49
5	[pers pn] [was/were] introduced [prep] the	37
6	[conj] [was/were] introduced [prep] the	14
7	[noun prp] [was/were] introduced [prep] the	13
8	which [was/were] introduced [prep] the	12
9	[Wh det] [was/were] introduced [prep] the	12
10	which [was/were] introduced [prep] the	12
11	i [was/were] introduced [prep] the	10
12	and [was/were] introduced [prep] the	10
13	it [was/were] introduced [prep] the	10
14	it [was/were] introduced [prep] the	10
15	i [was/were] introduced [prep] the	10
16	[coord] [was/were] introduced [prep] the	10
17	and [was/were] introduced [prep] the	10
18	[adj] [was/were] introduced [prep] the	9
19	they [was/were] introduced [prep] the	6
20	he [was/were] introduced [prep] the	5
21	system [was/were] introduced [prep] the	5
22	he [was/were] introduced [prep] the	5
23	they [was/were] introduced [prep] the	5
24	system [was/were] introduced [prep] the	5
25	[was/were] [adv] introduced [prep] the	33
26	[was/were] [adv] introduced [prep] the	27
27	[was/were] [adj] introduced [prep] the	19
28	[was/were] first introduced [prep] the	18
29	[was/were] first introduced [prep] the	18
30	[was/were] [num ord] introduced [prep] the	18