Can Sphinx generate keywords for a site?

Question

Sphinx

There is a base for example news with fields id, title, text.
It's all fed by Sphinx.
Is it possible to somehow pull out the top keywords for each ID? For SEO optimization.
Or give Sphinx the text, and he returns the keywords?
There is such a request, but Sphinx will search in its database, but you need only one ID.
call keywords('US Russia', 'news', 1);
+--------------+------------+------+-------+
| tokenised | normalized | docs | hits |
+--------------+------------+------+-------+
| usa | usa | 2524 | 14579 |
| russia | ross | 4263 | 38251 |
+--------------+------------+------+-------+
Thank you.