![sbb-ner-demo example](.screenshots/sbb_ner_demo.png?raw=true)

How the models have been obtained is described in our [paper](https://corpora.linguistik.uni-erlangen.de/data/konvens/proceedings/papers/KONVENS2019_paper_4.pdf).

***

# Installation:

Setup virtual environment:
```
virtualenv --python=python3.6 venv
```

Activate virtual environment:
```
source venv/bin/activate
```

Upgrade pip:
```
pip install -U pip
```

Install package together with its dependencies in development mode:
```
pip install -e ./
```

Download required models: https://qurator-data.de/sbb_ner/models.tar.gz 

Extract model archive:
```
tar -xzf models.tar.gz
```

Run webapp directly:

```
env FLASK_APP=qurator/sbb_ner/webapp/app.py env FLASK_ENV=development env USE_CUDA=True flask run --host=0.0.0.0
```

Set USE_CUDA=False, if you do not have a GPU available/installed.


For production purposes rather use
```
env USE_CUDA=True/False gunicorn --bind 0.0.0.0:5000 qurator.sbb_ner.webapp.wsgi:app
```

If you want to use a different model configuration file:

```
env USE_CUDA=True/False env CONFIG=`realpath ./my-config.json` gunicorn --bind 0.0.0.0:5000 qurator.sbb_ner.webapp.wsgi:app
```

# Docker

## CPU-only:

```
docker build --build-arg http_proxy=$http_proxy  -t qurator/webapp-ner-cpu -f Dockerfile.cpu .
```

```
docker run -ti --rm=true --mount type=bind,source=data/konvens2019,target=/usr/src/qurator-sbb-ner/data/konvens2019 -p 5000:5000 qurator/webapp-ner-cpu
```

## GPU:

Make sure that your GPU is correctly set up and that nvidia-docker has been installed.


```
docker build --build-arg http_proxy=$http_proxy  -t qurator/webapp-ner-gpu -f Dockerfile .
```

```
docker run -ti --rm=true --mount type=bind,source=data/konvens2019,target=/usr/src/qurator-sbb-ner/data/konvens2019 -p 5000:5000 qurator/webapp-ner-gpu
```

NER web-interface is availabe at http://localhost:5000 . 

# REST - Interface

Get available models:
```
curl http://localhost:5000/models
```

Output:

```
[
  {
    "default": true, 
    "id": 1, 
    "model_dir": "data/konvens2019/build-wd_0.03/bert-all-german-de-finetuned", 
    "name": "DC-SBB + CONLL + GERMEVAL"
  }, 
  {
    "default": false, 
    "id": 2, 
    "model_dir": "data/konvens2019/build-on-all-german-de-finetuned/bert-sbb-de-finetuned", 
    "name": "DC-SBB + CONLL + GERMEVAL + SBB"
  }, 
  {
    "default": false, 
    "id": 3, 
    "model_dir": "data/konvens2019/build-wd_0.03/bert-sbb-de-finetuned", 
    "name": "DC-SBB + SBB"
  }, 
  {
    "default": false, 
    "id": 4, 
    "model_dir": "data/konvens2019/build-wd_0.03/bert-all-german-baseline", 
    "name": "CONLL + GERMEVAL"
  }
]
```

Perform NER using model 1: 

```
curl -d '{ "text": "Paris Hilton wohnt im Hilton Paris in Paris." }' -H "Content-Type: application/json" http://localhost:5000/ner/1
```

Output:

```
[
  [
    {
      "prediction": "B-PER", 
      "word": "Paris"
    }, 
    {
      "prediction": "I-PER", 
      "word": "Hilton"
    }, 
    {
      "prediction": "O", 
      "word": "wohnt"
    }, 
    {
      "prediction": "O", 
      "word": "im"
    }, 
    {
      "prediction": "B-ORG", 
      "word": "Hilton"
    }, 
    {
      "prediction": "I-ORG", 
      "word": "Paris"
    }, 
    {
      "prediction": "O", 
      "word": "in"
    }, 
    {
      "prediction": "B-LOC", 
      "word": "Paris"
    }, 
    {
      "prediction": "O", 
      "word": "."
    }
  ]
]
```
The JSON above is the expected input format of the 
[SBB named entity linking and disambiguation system](https://github.com/qurator-spk/sbb_ned).
# Model-Training 

***
## Preprocessing of NER ground-truth:


### compile_conll

Read CONLL 2003 ner ground truth files from directory and
write the outcome of the data parsing to some pandas DataFrame that is
stored as pickle.

#### Usage

```
compile_conll --help
```

### compile_germ_eval

Read germ eval .tsv files from directory and write the
outcome of the data parsing to some pandas DataFrame that is stored as
pickle.

#### Usage

```
compile_germ_eval --help
```

### compile_europeana_historic

Read europeana historic ner ground truth .bio files from directory 
and write the outcome of the data parsing to some pandas
DataFrame that is stored as pickle.

#### Usage

```
compile_europeana_historic --help
```


### compile_wikiner

Read wikiner files from directory and write the outcome
of the data parsing to some pandas DataFrame that is stored as pickle.

#### Usage

```
compile_wikiner --help
```

***
## Train BERT - NER model:

### bert-ner

Perform BERT for NER supervised training and test/cross-validation.

#### Usage

```
bert-ner --help
```

### bert-pregenerate-trainingdata

Generate data for BERT pre-training from a corpus text file where 
the documents are separated by an empty line (output of corpuscollect).

#### Usage

```
bert-pregenerate-trainingdata --help
```

### bert-finetune

Perform BERT pre-training on pre-generated data.

#### Usage

```
bert-finetune --help
```