Sundar Pichai, Google’s chief executive officer, has explained why the pictures of United State president, Donald Trump, pop up on Google Images when people search the term “idiot.”

Speaking in front of the House Judiciary Committee on Tuesday, Pichai explained that the company doesn’t “manually intervene” in search results.

“How would that happen? Democratic Congresswoman Zoe Lofgren asked Pichai.

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Fortune reports that Pichai responded by explaining that Google has a search algorithm that collates data from billions of web pages.

“Any time you type in a keyword, as Google we have gone out and crawled and stored copies of billions of (website) pages in our index. And we take the keyword and match it against their pages and rank them based on over 200 signals — things like relevance, freshness, popularity, how other people are using it,” he said.

“And based on that, at any given time, we try to rank and find the best search results for that query. And then we evaluate them with external raters, and they evaluate it to objective guidelines. And that’s how we make sure the process is working.”

The House committee held the hearing to discuss whether Google’s search results are politically slanted. Shortly before Pichai’s explanation, which was prompted by a question from Rep. Zoe Lofgren (D-CA), Rep. Lamar Smith (R-Texas) had claimed to have “irrefutable” evidence that Google was suppressing conservative search results.

Meanwhile after Green Day song American Idiot was used by protesters in the UK during a visit by Donald Trump, internet activists worked to entrench the connection between the pejorative and images of the leader.