Make the solution of the previous exercise into a separate WikipediaLinkTemplate tiddler that can be transcluded, so that it can be used for creating links to more things than just aardvarks. As we learned in Ex:VariableTransclusion, variable values will carry across transclusion boundaries, so refer to the value of a variable called articleName to decide what article to link to.

While you're at it, make this template more robust by getting the value https://en.wikipedia.org/wiki/ from another tiddler; this way, we can reference the base URL of Wikipedia from other places, and only have to update it in one place if it changes.