How about utilizing ordinal information from the distribution of unlabeled data.

@inproceedings{qian-2010-utilizing, author = {Mingjie Qian and Bo Chen and Hongzhi Xu and Hongwei Qi}, editor = {Jimmy Huang and Nick Koudas and Gareth J. F. Jones and Xindong Wu and Kevyn Collins-Thompson and Aijun An}, title = {{How about utilizing ordinal information from the distribution of unlabeled data}}, booktitle = {{Proceedings of the 19th ACM Conference on Information and Knowledge Management, CIKM 2010, Toronto, Ontario, Canada, October 26-30, 2010}}, pages = {289--298}, publisher = {ACM}, year = {2010}, url = {https://doi.org/10.1145/1871437.1871477}, doi = {https://doi.org/10.1145/1871437.1871477} }