Tips for machine learning in the medical field

Hello, first time post. My partner is working on machine learning to help with cancer patients. Running into a search error when using "apostrophes " in the search algorithm. Mainly used in journals. Thought I'd post to see if there are any tips. The program is called Doccano

This is what she thinks it may be. Any ideas to support would be super appreciated.

https://github.com/doccano/doccano/issues/1870