select the part of the sentence that the participial phrase modifies. in 2013, german authorities discovered…

select the part of the sentence that the participial phrase modifies. in 2013, german authorities discovered more than one thousand pieces of artwork hidden in the munich apartment of an elderly recluse.
Answer
Brief Explanations:
A participial phrase acts as an adjective and modifies a noun. In the given sentence, "hidden in the Munich apartment of an elderly recluse" is the participial phrase, and it describes the "artwork".
Answer:
artwork