Where are the nouns in sentence luck is instrument of foolishness?

Here are the nouns in the sentence "Luck is an instrument of foolishness":

* Luck: This is the subject of the sentence.

* Instrument: This is the predicate nominative, which renames the subject "luck."

* Foolishness: This is the object of the preposition "of".

Let me know if you have any other sentences you'd like to analyze!