[ allennlp.predictors.sentence_tagger ]
class SentenceTaggerPredictor(Predictor): | def __init__( | self, | model: Model, | dataset_reader: DatasetReader, | language: str = "en_core_web_sm" | ) -> None
Registered as a
Predictor with name "sentence_tagger".
| def predict(self, sentence: str) -> JsonDict
| @overrides | def predictions_to_labeled_instances( | self, | instance: Instance, | outputs: Dict[str, numpy.ndarray] | ) -> List[Instance]
This function currently only handles BIOUL tags.
Imagine an NER model predicts three named entities (each one with potentially multiple tokens). For each individual entity, we create a new Instance that has the label set to only that entity and the rest of the tokens are labeled as outside. We then return a list of those Instances.
Mary went to Seattle to visit Microsoft Research U-Per O O U-Loc O O B-Org L-Org
We create three instances.
Mary went to Seattle to visit Microsoft Research U-Per O O O O O O O Mary went to Seattle to visit Microsoft Research O O O U-LOC O O O O Mary went to Seattle to visit Microsoft Research O O O O O O B-Org L-Org
We additionally add a flag to these instances to tell the model to only compute loss on non-O tags, so that we get gradients that are specific to the particular span prediction that each instance represents.