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How to represent multi-label colours in one-hot encoding?

Say I want to predict the price of a gemstone based on its colour. I have two options: averaging over its colour on an RGB scale, or using its textual description. If I was to choose the latter, how ...
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Which data representation of text as input for NLP Deep Learning models?

I have been given a data set with 30.000 text documents (each text file is rather small with respect to its length and consists in most cases of around 20 sentences), which are labelled with 0 or 1. ...