| ## Mapping |
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| If a file is passed to the predictor, |
| the predicted spans will be converted into a new ontology. |
| The file format should be |
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| `<original parent label>\t<original label>\t<new label>` |
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| If the predicted span is labeled as `<original label>`, |
| and its parent is labeled as `<orignal parent label>`, |
| it will be re-labeled as `<new label>`. |
| If no rules match, the span and all of its descendents will be ignored. |
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| The `<original parent label>` is optional. |
| If the parent label is `@@VIRTUAL_ROOT@@`, then this rule matches the first layer of spans. |
| In semantic parsing, it matches events. |
| If the parent label is `*`, it means it can match anything. |
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