Review
Phrases [1] and [5] are adjective phrases. In [1], the Complement is the clause to swim. In [5] the Complement is the PP of his potential.
In the NP shown in [2], the Complement is that the money was stolen. The Head is the abstract noun fact.
The PP in [3] consists of a Head below, and a Complement the horizon.
Finally, in [4], the phrase is a VP. The Complement of the Head learning is the clause to drive.