Confusing reference to a "previous exercise" in the "Map Extraction with Keys and Vals" section

[zoodor]

In the exercise "Get the Keys & Values from the map of yourself", it states:

Use the map you made about yourself in previous exercise

Aside from a missing "a" or "the" in "in previous exercise", it is not clear what "previous exercise" is being referred to.

There is a "Model Yourself" exercise on the "EXERCISE: Modelling People" page, but this is a couple of pages later…