Grouping entites

[Maiia Bocharova]

I am sorry, I know this is not an issue, but I don't know where to ask it.

I have a task to group entities together: I have a chemical and its characteristics, I am parsing them using NER (huggingface transformers) and quality is OK, but I don't know how to group each chemical with corresponding characteristics (I don't even how the task is called). I can write some rules, that characteristics which appear after the chemical name correspond to this chemical, but sometimes the order is different and some characteristics appear before the name of the chemical.

So I want to use some model to link chemicals and their corresponding characteristics somehow together.

Please can you help me and give me some advice for this problem