No | Pattern | Freq | Relations |
---|---|---|---|
1 | system have been [art] [adj] | 9 |
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2 | system have been a [adj] | 9 |
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3 | system have been a [adj] | 8 |
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4 | system have been [art] [adj] | 8 |
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5 | system has been [art] [adj] | 6 |
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