Tell me, is there any service with an API that could determine the subject of pages by reference?

Question

data mining

Preferably free. Or a ready-made library

Answer 1

On the topic of a service with an API - there are hardly any. In theory, you need to dig towards LDA .
The implementation is in Apache Spark MLib, for example.
spark.apache.org/docs/1.6.1/mllib-clustering.html#...