highlight preloaded named entities for easier relationship classification

[charliejeynes]

Is your feature request related to a problem?
It would be great if the uploaded data also had options columns for named entities that had already been identified by another tool (e.g. Spacy).

What is the expected behavior?
The labelling boxes would have the named entities text spans highlighted in bold (or a colour), so that then the user could easier see which entities were relevant in a sentence, and classify a relationship accordingly

Additional context (if any):
This would make relationship classification much less of a cognitive load. Currently, i'm having to thinking about which entities in a sentence are related - it would be much easier if they were already highlighted