Khandpur, R., Ji, T., Ning, Y., Zhao, L., Lu, C.-T., Smith, E., Adams, C., & Ramakrishnan, N. (2017). Determining Relative Airport Threats from News and Social Media. Proceedings of the AAAI Conference on Artificial Intelligence, 31(2), 4701-4707. https://doi.org/10.1609/aaai.v31i2.19097