<p>Google was founded by Larry Page and Sergey Brin while they were Ph.D. students at<strong> Stanford University</strong>.</p>
In what way do you say its not working properly? could you elaborate as to what your getting and what your expect to happen??
The tag itself is fine. The reason the test isn’t letting you pass is what is inside that strong tag. Look closely, the text doesn’t quite match that given.
Specifically, take a look where you put that opening tag. There’s a space in the strong tag that shouldn’t be there.