What is the prepositional phrase in sentence You found trinket within old trunk?

The prepositional phrase in the sentence "You found a trinket within an old trunk" is "within an old trunk".

Here's why:

* Prepositional Phrase: A prepositional phrase starts with a preposition (in this case, "within") and includes the object of the preposition (in this case, "an old trunk").

* Preposition: A preposition is a word that shows the relationship between a noun or pronoun (the object of the preposition) and another word in the sentence.

* Object of the Preposition: The noun or pronoun that follows the preposition and completes the prepositional phrase.

In this sentence, "within an old trunk" tells us where the trinket was found.