Character-Based Models for Adversarial Phone Extraction: Preventing Human Sex Trafficking Nathanael Chambers author Timothy Forman author Catherine Griswold author Kevin Lu author Yogaish Khastgir author Stephen Steckler author 2019-11 text Proceedings of the 5th Workshop on Noisy User-generated Text (W-NUT 2019) Wei Xu editor Alan Ritter editor Tim Baldwin editor Afshin Rahimi editor Association for Computational Linguistics Hong Kong, China conference publication chambers-etal-2019-character 10.18653/v1/D19-5507 https://aclanthology.org/D19-5507/ 2019-11 48 56