PLSUM: Generating PT-BR Wikipedia by Summarizing Multiple Websites


Wikipedia is an important free source of intelligible knowledge. Despite that, Brazilian Portuguese Wikipedia still lacks descriptions for many subjects. In an effort to expand the Brazilian Wikipedia, we contribute PLSum, a framework for generating wiki-like abstractive summaries from multiple descriptive websites. The framework has an extractive stage followed by an abstractive one. In particular, for the abstractive stage, we fine-tune and compare two recent variations of the Transformer neural network, PTT5, and Longformer. To fine-tune and evaluate the model, we created a dataset with thousands of examples, linking reference websites to Wikipedia. Our results show that it is possible to generate meaningful abstractive summaries from Brazilian Portuguese web content.


Bahdanau, D., Cho, K., and Bengio, Y. (2014). Neural machine translation by jointly learning to align and translate. arXiv preprint arXiv:1409.0473.

Beltagy, I., Peters, M. E., and Cohan, A. (2020). Longformer: The long-document transformer. arXiv preprint arXiv:2004.05150.

Carmo, D., Piau, M., Campiotti, I., Nogueira, R., and Lotufo, R. (2020). Ptt5: Pretraining and validating the t5 model on brazilian portuguese data. arXiv preprint arXiv:2008.09144.

Gupta, S. and Gupta, S. (2019). Abstractive summarization: An overview of the state of the art. Expert Systems with Applications, 121:49–65.

Hermann, K. M., Kocisky, T., Grefenstette, E., Espeholt, L., Kay, W., Suleyman, M., and Blunsom, P. (2015). Teaching machines to read and comprehend. In Advances in neural information processing systems, pages 1693–1701.

Hochreiter, S. and Schmidhuber, J. (1997). Long short-term memory. Neural computation, 9(8):1735–1780.

Jorge, M. L. d. R. C. (2010). Sumarização automática multidocumento: seleção de conteúdo com base no Modelo CST (Cross-document Structure Theory). PhD thesis, Universidade de São Paulo.

Lebanoff, L., Song, K., and Liu, F. (2018). Adapting the neural encoder-decoder framework from single to multi-document summarization. arXiv preprint arXiv:1808.06218.

Leixo, P., Pardo, T. A. S., et al. (2008). Cstnews: um corpus de textos jornalísticos anotados segundo a teoria discursiva multidocumento cst (cross-document structure theory). Technical Report NILC-TR-08-05, Núcleo Interinstitucional de Lingüística Computacional, Universidade de São Paulo, São Carlos, SP, Brazil.

Lin, C.-Y. (2004). Rouge: A package for automatic evaluation of summaries. In Text summarization branches out, pages 74–81.

Liu, P. J., Saleh, M., Pot, E., Goodrich, B., Sepassi, R., Kaiser, L., and Shazeer, N. (2018). Generating wikipedia by summarizing long sequences. arXiv preprint arXiv:1801.10198.

Raffel, C., Shazeer, N., Roberts, A., Lee, K., Narang, S., Matena, M., Zhou, Y., Li, W., and Liu, P. J. (2019). Exploring the limits of transfer learning with a unified text-to-text transformer. arXiv preprint arXiv:1910.10683.

Ramos, J. et al. (2003). Using tf-idf to determine word relevance in document queries. In Proceedings of the First Instructional Conference on Machine Learning, pages 29–48. Citeseer.

Ribaldo, R. and Pardo, T. A. (2013). Investigaçao de mapas de relacionamento para sumarizaçao multidocumento. Monografia de Conclusão de Curso. Instituto de Ciências Matemáticas e de Computação, Universidade de São Paulo. São Carlos-SP, November, 61p.

Rush, A. M., Chopra, S., and Weston, J. (2015). A neural attention model for abstractive sentence summarization. arXiv preprint arXiv:1509.00685.

See, A., Liu, P. J., and Manning, C. D. (2017). Get to the point: Summarization with pointer-generator networks. arXiv preprint arXiv:1704.04368.

Vaswani, A., Shazeer, N., Parmar, N., Uszkoreit, J., Jones, L., Gomez, A. N., Kaiser, L., and Polosukhin, I. (2017). Attention is all you need. arXiv preprint arXiv:1706.03762.

Wagner, J., Wilkens, R., Idiart, M., and Villavicencio, A. (2018). The brwac corpus: A new open resource for brazilian portuguese. In Proc. of the Int. Conf. on Language Resources and Evaluation, pages 4339–4344.
Como Citar

Selecione um Formato
OLIVEIRA, André Seidel; COSTA, Anna H. Reali. PLSUM: Generating PT-BR Wikipedia by Summarizing Multiple Websites. In: ENCONTRO NACIONAL DE INTELIGÊNCIA ARTIFICIAL E COMPUTACIONAL (ENIAC), 18. , 2021, Evento Online. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2021 . p. 751-762. DOI:

Artigos mais lidos do(s) mesmo(s) autor(es)