BILEAT_E2E_ABSA

BERT-based Interactive Learning with Ensemble Adversarial Training

Requirements

• Install requirements using requirements.txt

pip install -r requirements.txt

• To filter out antonyms we use word embeddings used by Jin, Di, et al.. You can download that from here. Place it in the root directory before running code for generating adversarial examples.

Getting Started

White Box Domain Knowledge BERT (WBDK-BERT)

For white-box adversarial post training of DK-BERT, we use the Amazon Laptop review and Yelp restaurant review datasets from here. Any other dataset can be used as well just by replacing the laptop.txt and rest.txt file contents. To start the training, inside the WBDK-BERT/scripts directory run:

$ bash pt.sh laptop 5 2000 0

$ bash pt.sh rest 1 2000 0

here, 5 and 1 are the data duplication factors, 2000 is the number of training steps (we actually save models at every 500 steps).

Now, the trained models will be save in WBDK-BERT/{domain}_pt_adv directory which will be then loaded later for use by BILEAT.

Optional You can either start training from scratch by loading BERT-base and performing adversarial post-training on top of that (which is computationally expensive) or by loading post-trained domain knowledge BERT (DK-BERT) and continue adversarial post-training for reduced number of iterations. For training from scratch using BERT-base, set BERT attribute in WBDK-BERT/scripts/pt.sh to bert-base. Use 70000 and 140000 iterations respectively.

Generating Black-box adversarial examples

1. Replace BILEAT with BERTLINEAR in absa_layer.py line 133.

2. Run gen_adv.sh. This first trains BERT + Linear model to get the target model, then performs black-box attack to generate adversarial examples.

The output is stored in {domain}_adv directory.

Running BILEAT

After completing the above two steps, run:

$ bash train.sh

This will first load the post-trained WBDK-BERT model from {domain}_adv and train the model using BILEAT architecture along with adversarial data generated earlier using BERT + Linear.

Adversarial Data

We provide quality adversarial examples generated by us for SemEval14 laptop and SemEval combined restaurant data. You can find them under data/laptop14_adv and data/rest_total_adv respectively.