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README.md
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# Model Card for h10505jd-a63140nd-ED-Opt-B
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<!-- Provide a quick summary of what the model is/does. -->
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This is a sequence relation classification model that was trained to
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detect whether a given piece of evidence is relevant to a given claim.
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## Model Details
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### Model Description
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<!-- Provide a longer summary of what this model is. -->
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This model addresses the Evidence Detection (ED) shared task: given a claim and a piece of evidence, determine if the evidence is relevant to that claim (binary classification). This model has a Bert preprocessor and encoder, that has not been fine-tuned, that feed into a multi layered BLSTM model with self-attention mechanism that was fine-tuned on 21K pairs of texts. The input sequences are concatenated to form a larger input sequence, with each sequence preceded by "CLAIM:" and "EVIDENCE:" respectively.
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- **Developed by:** James Deslandes and Nikolaos Douranos
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- **Language(s):** English
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- **Model type:** Supervised
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- **Model architecture:** BLSTM
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### Model Resources
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<!-- Provide links where applicable. -->
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- **Preprocessor:** "https://kaggle.com/models/tensorflow/bert/TensorFlow2/en-uncased-preprocess/3"
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- **Encoder Model:** https://www.kaggle.com/models/tensorflow/bert/TensorFlow2/en-uncased-l-12-h-768-a-12/4
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- **Repo:** https://huggingface.co/Jed612/encoder-BLSTM
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## Training Details
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### Training Data
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This model was trained on 21K claim-evidence pairs.
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### Training Procedure
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#### Training Hyperparameters
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- batch_size: 32
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- epochs: 4
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- learning_rate: 1e-4
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#### Speeds, Sizes, Times
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- overall training time: 16 minutes
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- duration per training epoch: 4 minutes
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- model size: 500MB
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## Evaluation
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### Testing Data & Metrics
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#### Testing Data
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A seperate validation dataset of 6K claim-evidence pairs.
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#### Metrics
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- ROC AUC
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- Specificity
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- Precision
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- Recall
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- F1-score
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- Accuracy
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- average accuracy over 4 models
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### Results
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The model obtained an ROC AUC of 0.91, a specificity of 92.8%, a precision of 78.1% a recall of 66.6%, an F1-score of 71.9% and an accuracy of 85.6%. Four different models with this structure were trained and their accuracies averaged to 85.4%. The error bars show twice the standard deviation, either side of the mean.
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**Training and Validation Accuracy and Loss Mean:**
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## Technical Specifications
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### Hardware
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- RAM: at least 4 GB
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- Storage: at least 50 GB,
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- GPU: T4
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### Software
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- Tensorflow
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- Tensorflow_hub
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- Keras 2
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## Bias, Risks, and Limitations
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Any inputs (concatenation of two sequences) longer than
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512 subwords will be truncated by the model.
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## Additional Information
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The hyperparameters were determined by experimentation
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with different values.
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