Hong, Yining, Qing Li, Ran Gong, Daniel Ciao, Siyuan Huang, and Song-Chun Zhu. 2021. “SMART: A Situation Model for Algebra Story Problems via Attributed Grammar”. Proceedings of the AAAI Conference on Artificial Intelligence 35 (14):13009-17. https://doi.org/10.1609/aaai.v35i14.17538.