We dont have base rel='nofollow' href. The sample is like the below
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="fragment" content="!">
<title ng-bind="pageTitle || 'Skil.ai - '">Skil.ai | Deep learning | Virtual Assistants</title>
<base rel='nofollow' href="/">