You can find the dataset from here.
Please cite:
@inproceedings{gong2019deep,
title={Deep cascade multi-task learning for slot filling in online shopping assistant},
author={Gong, Yu and Luo, Xusheng and Zhu, Yu and Ou, Wenwu and Li, Zhao and Zhu, Muhua and Zhu, Kenny Q and Duan, Lu and Chen, Xi},
booktitle={Proceedings of the AAAI Conference on Artificial Intelligence},
volume={33},
pages={6465--6472},
year={2019}
}