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license: mit
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---
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---
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license: mit
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language: en
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tags:
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- bert
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- cloze
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- distractor
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- generation
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datasets:
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- dgen
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widget:
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- text: "The only known planet with large amounts of water is [MASK]. [SEP] earth"
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- text: "The products of photosynthesis are glucose and [MASK] else. [SEP] oxygen"
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---
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# cdgp-csg-scibert-dgen
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## Model description
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This model is a Candidate Set Generator in **"CDGP: Automatic Cloze Distractor Generation based on Pre-trained Language Model", Findings of EMNLP 2022**.
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Its input are stem and answer, and output is candidate set of distractors. It is fine-tuned by [**DGen**](https://github.com/DRSY/DGen) dataset based on [**allenai/scibert_scivocab_uncased**](https://huggingface.co/allenai/scibert_scivocab_uncased) model.
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For more details, you can see our **paper** or [**GitHub**](https://github.com/AndyChiangSH/CDGP).
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## How to use?
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1. Download model by hugging face transformers.
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```python
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from transformers import BertTokenizer, BertForMaskedLM, pipeline
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tokenizer = BertTokenizer.from_pretrained("AndyChiang/cdgp-csg-scibert-dgen")
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csg_model = BertForMaskedLM.from_pretrained("AndyChiang/cdgp-csg-scibert-dgen")
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```
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2. Create a unmasker.
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```python
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unmasker = pipeline("fill-mask", tokenizer=tokenizer, model=csg_model, top_k=10)
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```
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3. Use the unmasker to generate the candidate set of distractors.
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```python
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sent = "The only known planet with large amounts of water is [MASK]. [SEP] earth"
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cs = unmasker(sent)
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print(cs)
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```
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## Dataset
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This model is fine-tuned by [DGen](https://github.com/DRSY/DGen) dataset, which covers multiple domains including science, vocabulary, common sense and trivia. It is compiled from a wide variety of datasets including SciQ, MCQL, AI2 Science Questions, etc. The detail of DGen dataset is shown below.
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| DGen dataset | Train | Valid | Test | Total |
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| ----------------------- | ----- | ----- | ---- | ----- |
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| **Number of questions** | 2321 | 300 | 259 | 2880 |
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You can also use the [dataset](https://github.com/AndyChiangSH/CDGP/blob/main/datasets/DGen.zip) we have already cleaned.
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## Training
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We use a special way to fine-tune model, which is called **"Answer-Relating Fine-Tune"**. More details are in our paper.
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### Training hyperparameters
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The following hyperparameters were used during training:
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- Pre-train language model: [allenai/scibert_scivocab_uncased](https://huggingface.co/allenai/scibert_scivocab_uncased)
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- Optimizer: adam
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- Learning rate: 0.0001
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- Max length of input: 64
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- Batch size: 64
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- Epoch: 1
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- Device: NVIDIA® Tesla T4 in Google Colab
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## Testing
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The evaluations of this model as a Candidate Set Generator in CDGP is as follows:
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| P@1 | F1@3 | MRR | NDCG@10 |
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| ----- | ----- | ----- | ------- |
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| 13.13 | 12.23 | 25.12 | 34.17 |
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## Other models
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### Candidate Set Generator
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| Models | CLOTH | DGen |
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| ----------- | ----------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
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| **BERT** | [cdgp-csg-bert-cloth](https://huggingface.co/AndyChiang/cdgp-csg-bert-cloth) | [cdgp-csg-bert-dgen](https://huggingface.co/AndyChiang/cdgp-csg-bert-dgen) |
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| **SciBERT** | [cdgp-csg-scibert-cloth](https://huggingface.co/AndyChiang/cdgp-csg-scibert-cloth) | [*cdgp-csg-scibert-dgen*](https://huggingface.co/AndyChiang/cdgp-csg-scibert-dgen) |
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| **RoBERTa** | [cdgp-csg-roberta-cloth](https://huggingface.co/AndyChiang/cdgp-csg-roberta-cloth) | [cdgp-csg-roberta-dgen](https://huggingface.co/AndyChiang/cdgp-csg-roberta-dgen) |
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| **BART** | [cdgp-csg-bart-cloth](https://huggingface.co/AndyChiang/cdgp-csg-bart-cloth) | [cdgp-csg-bart-dgen](https://huggingface.co/AndyChiang/cdgp-csg-bart-dgen) |
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### Distractor Selector
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**fastText**: [cdgp-ds-fasttext](https://huggingface.co/AndyChiang/cdgp-ds-fasttext)
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## Citation
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None
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