  Although previous research on Aspect-based Sentiment Analysis (ABSA) for
Indonesian reviews in hotel domain has been conducted using CNN and XGBoost,
its model did not generalize well in test data and high number of OOV words
contributed to misclassification cases. Nowadays, most state-of-the-art results
for wide array of NLP tasks are achieved by utilizing pretrained language
representation. In this paper, we intend to incorporate one of the foremost
language representation model, BERT, to perform ABSA in Indonesian reviews
dataset. By combining multilingual BERT (m-BERT) with task transformation
method, we manage to achieve significant improvement by 8% on the F1-score
compared to the result from our previous study.
