<http://schema.org/coursePrerequisite>
"This class assumes an understanding of programming at the level of CS101, including the ability to read and write short programs in Python; it also assumes a comfort level with mathematical notation at the level of high school Algebra II or the SATs."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.udacity.com/course/intro-to-algorithms--cs215>