AmericasNLI: Evaluating Zero-shot Natural Language Understanding of Pretrained Multilingual Models in Truly Low-resource Languages. - Abteen Ebrahimi; Manuel Mager; Arturo Oncevay; Vishrav Chaudhary; Luis Chiruzzo; Angela Fan; John E. Ortega; Ricardo Ramos; Annette Rios; Ivan Vladimir; Gustavo Alberto Giménez Lugo; Elisabeth Mager; et al. (CoRR, 2021)