For “jeans”, when we filter for keywords in positions 1-20 and export, we get 900 odd keywords. Drop them into a spreadsheet and add the headings “category 1” and “category 2”. You’ll then drop “bottoms” into category 1 and “jeans” into category 2 and fill down:

This is the start of your machine learning “training data”. There’s probably enough data here already, but I like to be thorough so I’m also going to grab all the keywords from a company I know ranks highly for every clothing based keyword – ASOS.