@InProceedings{TakakoHashimoto:2021,
  author = {Takako Hashimoto, Takeaki Uno, Yuka Takedomi, David Shepard, Masashi Toyoda, Naoki Yoshinaga, Masaru Kitsuregawa, Ryota Kobayashi},
  title = {Two-stage Clustering Method for Discovering People's Perceptions: A Case Study of the COVID-19 Vaccine from Twitter},
  booktitle = {2021 IEEE International Conference on Big Data (Big Data)},
  year      = {2021},
  pages     = {614-621},
}