How to determine the semantics of a sentence?

Question

Algorithms

Let me know if there are any suggestions. There are different categories such as IT, Construction, Medicine. How can you categorize offers? Example (If your computer is broken, We build a house, Buy medicine)

Answer 1

By keywords and their combinations. Accordingly, you need to have a base of the form word - topic (to put it very roughly). The database can be compiled by analyzing, for example, articles on relevant topics and determining the probability of encountering certain words in a particular topic. Certainly not by hand.