Table 1.
Kernels
| Notation | Formula | Used information |
|---|---|---|
| KS(t1, t2) |  |
Deep syntactic |
| KLEX(t1, t2) |  |
Lexical + deep syntactic |
| KPOS(t1, t2) | |
Shallow + deep syntactic |
| KFULL(t1, t2) | KLEX + KFULL | Lexical + Shallow + deep syntactic |
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