---
library_name: span-marker
tags:
- span-marker
- token-classification
- ner
- named-entity-recognition
- generated_from_span_marker_trainer
datasets:
- conll2003
metrics:
- precision
- recall
- f1
widget:
- text: Atlanta Games silver medal winner Edwards has called on other leading athletes
    to take part in the Sarajevo meeting--a goodwill gesture towards Bosnia as it
    recovers from the war in the Balkans--two days after the grand prix final in Milan.
- text: Portsmouth:Middlesex 199 and 426 (J. Pooley 111,M. Ramprakash 108,M. Gatting
    83), Hampshire 232 and 109-5.
- text: Poland's Foreign Minister Dariusz Rosati will visit Yugoslavia on September
    3 and 4 to revive a dialogue between the two governments which was effectively
    frozen in 1992,PAP news agency reported on Friday.
- text: The authorities are apparently extremely afraid of any political and social
    discontent," said Xiao,in Manila to attend an Amnesty International conference
    on human rights in China.
- text: American Nate Miller successfully defended his WBA cruiserweight title when
    he knocked out compatriot James Heath in the seventh round of their bout on Saturday.
pipeline_tag: token-classification
model-index:
- name: SpanMarker
  results:
  - task:
      type: token-classification
      name: Named Entity Recognition
    dataset:
      name: Unknown
      type: conll2003
      split: eval
    metrics:
    - type: f1
      value: 0.9550004205568171
      name: F1
    - type: precision
      value: 0.9542780299209951
      name: Precision
    - type: recall
      value: 0.9557239057239058
      name: Recall
---

# SpanMarker

This is a [SpanMarker](https://github.com/tomaarsen/SpanMarkerNER) model trained on the [conll2003](https://huggingface.co/datasets/conll2003) dataset that can be used for Named Entity Recognition.

## Model Details

Important Note: I used the Tokenizer from "roberta-base".
```diff
from span_marker import SpanMarkerModel
from span_marker.tokenizer import SpanMarkerTokenizer

# Download from the 🤗 Hub
model = SpanMarkerModel.from_pretrained("lambdavi/span-marker-luke-base-conll2003")
+tokenizer = SpanMarkerTokenizer.from_pretrained("roberta-base", config=model.tokenizer.config)
+model.set_tokenizer(tokenizer)

# Run inference
entities = model.predict("Portsmouth:Middlesex 199 and 426 (J. Pooley 111,M. Ramprakash 108,M. Gatting 83), Hampshire 232 and 109-5.")
```

### Model Description
- **Model Type:** SpanMarker
<!-- - **Encoder:** [Unknown](https://huggingface.co/unknown) -->
- **Maximum Sequence Length:** 512 tokens
- **Maximum Entity Length:** 8 words
- **Training Dataset:** [conll2003](https://huggingface.co/datasets/conll2003)
<!-- - **Language:** Unknown -->
<!-- - **License:** Unknown -->

### Model Sources

- **Repository:** [SpanMarker on GitHub](https://github.com/tomaarsen/SpanMarkerNER)
- **Thesis:** [SpanMarker For Named Entity Recognition](https://raw.githubusercontent.com/tomaarsen/SpanMarkerNER/main/thesis.pdf)

### Model Labels
| Label | Examples                                                      |
|:------|:--------------------------------------------------------------|
| LOC   | "Germany", "BRUSSELS", "Britain"                              |
| MISC  | "German", "British", "EU-wide"                                |
| ORG   | "European Commission", "EU", "European Union"                 |
| PER   | "Werner Zwingmann", "Nikolaus van der Pas", "Peter Blackburn" |

## Uses

### Direct Use for Inference

```python
from span_marker import SpanMarkerModel
from span_marker.tokenizer import SpanMarkerTokenizer

# Download from the 🤗 Hub
model = SpanMarkerModel.from_pretrained("lambdavi/span-marker-luke-base-conll2003")
tokenizer = SpanMarkerTokenizer.from_pretrained("roberta-base", config=model.tokenizer.config)
model.set_tokenizer(tokenizer)

# Run inference
entities = model.predict("Portsmouth:Middlesex 199 and 426 (J. Pooley 111,M. Ramprakash 108,M. Gatting 83), Hampshire 232 and 109-5.")
```

### Downstream Use
You can finetune this model on your own dataset.

<details><summary>Click to expand</summary>

```python
from span_marker import SpanMarkerModel, Trainer

# Download from the 🤗 Hub
model = SpanMarkerModel.from_pretrained("span_marker_model_id")

# Specify a Dataset with "tokens" and "ner_tag" columns
dataset = load_dataset("conll2003") # For example CoNLL2003

# Initialize a Trainer using the pretrained model & dataset
trainer = Trainer(
    model=model,
    train_dataset=dataset["train"],
    eval_dataset=dataset["validation"],
)
trainer.train()
trainer.save_model("span_marker_model_id-finetuned")
```
</details>

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## Training Details

### Training Set Metrics
| Training set          | Min | Median  | Max |
|:----------------------|:----|:--------|:----|
| Sentence length       | 1   | 14.5019 | 113 |
| Entities per sentence | 0   | 1.6736  | 20  |

### Training Hyperparameters
- learning_rate: 1e-05
- train_batch_size: 8
- eval_batch_size: 8
- seed: 42
- gradient_accumulation_steps: 2
- total_train_batch_size: 16
- optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
- lr_scheduler_type: linear
- lr_scheduler_warmup_ratio: 0.1
- num_epochs: 5

### Training Results
| Epoch | Step | Validation Loss | Validation Precision | Validation Recall | Validation F1 | Validation Accuracy |
|:-----:|:----:|:---------------:|:--------------------:|:-----------------:|:-------------:|:-------------------:|
| 1.0   | 883  | 0.0123          | 0.9293               | 0.9274            | 0.9284        | 0.9848              |
| 2.0   | 1766 | 0.0089          | 0.9412               | 0.9456            | 0.9434        | 0.9882              |
| 3.0   | 2649 | 0.0077          | 0.9499               | 0.9505            | 0.9502        | 0.9893              |
| 4.0   | 3532 | 0.0070          | 0.9527               | 0.9537            | 0.9532        | 0.9900              |
| 5.0   | 4415 | 0.0068          | 0.9543               | 0.9557            | 0.9550        | 0.9902              |

### Framework Versions
- Python: 3.10.12
- SpanMarker: 1.5.0
- Transformers: 4.36.0
- PyTorch: 2.0.0
- Datasets: 2.16.1
- Tokenizers: 0.15.0

## Citation

### BibTeX
```
@software{Aarsen_SpanMarker,
    author = {Aarsen, Tom},
    license = {Apache-2.0},
    title = {{SpanMarker for Named Entity Recognition}},
    url = {https://github.com/tomaarsen/SpanMarkerNER}
}
```

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