I want to know the answer to the following question:
What search engine was added in Windows 8.1?
All the background I'm provided with is that "The upgrade addressed a number of criticisms faced by Windows 8 upon its release, with additional customization options for the Start screen, the restoration of a visible Start button on the desktop, the ability to snap up to four apps on a single display, and the ability to boot to the desktop instead of the Start screen.". Is that enough to answer the question?
Answer: no