No | Pattern | Freq | Relations |
---|---|---|---|
1 | [be] a [adj] contribution to | 40 |
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2 | [v-ing] a [adj] contribution to | 39 |
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3 | [be] [v-ing] a [adj] contribution | 17 |
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4 | [be] [v-ing] a contribution to | 5 |
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