Ask HN: How to build a dependency tree from Wikipedia articles?

Let's say we have three articles on Wikipedia A, B and C. To understand C you need to get grasp of B and for B you need to understand A (Simplified example: differentiation -> partial derivatives -> gradient). How could I build this "knowledge tree"? P.S One idea that I had is to extract summary of each article and extract all hyperlinks that point to other Wikipedia articles.