Why didn't they make a kind of search AI?

Question

Yandex

Let's say I ask a question - the program enters this question into Yandex and receives 20-50 pages from the search results. Next, she searches through all these pages for the most frequently occurring words in them. The paragraphs containing these words most likely contain the answer to your question. The program outputs one of these paragraphs and asks the user to rate the quality of the answer. if the answer satisfies the user, the program enters it and the keywords into its database. in this way, AI learns from the experience of people from all over the Internet and identifies connections between users' questions and the keywords that should be in the answer.
How do you think it is realistic to create such a thing?

Answer 1

If no one pays more than usual for this -> why bother again ?!)
In any case - all the answers on the Yandex blog: here
And how to use the Yandex search bar - here

Answer 2

cap ...
cap ...
cap, b;% №, military cap! ..

Answer 3

Rave. Difficult for general use.

Answer 4

There is such a thing, it's a metasearch.
If I'm looking for a formula, it will work, but the search engines give it out themselves?
And if I'm looking for a "parser in php" which paragraph should I pull out and show? How about code highlighting?
The same is true for queries like "how to find a job", "why does my husband drink", etc.