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{
"dataset_reader": {
"type": "conll2003",
"coding_scheme": "BIOUL",
"tag_label": "ner",
"token_indexers": {
"bert": {
"type": "bert-pretrained",
"do_lowercase": true,
"pretrained_model": "scibert_scivocab_uncased",
"use_starting_offsets": true
},
"token_characters": {
"type": "characters",
"min_padding_length": 3
}
}
},
"model": {
"type": "crf_tagger",
"calculate_span_f1": true,
"constrain_crf_decoding": true,
"dropout": 0.5,
"encoder": {
"type": "lstm",
"bidirectional": true,
"dropout": 0.5,
"hidden_size": 768,
"input_size": 896,
"num_layers": 2
},
"include_start_end_transitions": false,
"label_encoding": "BIOUL",
"text_field_embedder": {
"allow_unmatched_keys": true,
"embedder_to_indexer_map": {
"bert": ["bert", "bert-offsets"],
"token_characters": ["token_characters"]
},
"token_embedders": {
"bert": {
"type": "bert-pretrained",
"pretrained_model": "scibert_scivocab_uncased"
},
"token_characters": {
"type": "character_encoding",
"embedding": {
"embedding_dim": 16
},
"encoder": {
"type": "cnn",
"conv_layer_activation": "relu",
"embedding_dim": 16,
"ngram_filter_sizes": [3],
"num_filters": 128
}
}
}
}
}
}
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