What is the function of the noun phrase “the last slice of pizza” in this sentence? i gave the last slice pizza to my best friend.

In january 2014 and i started 1 million pennies project she put donation jars in school and shops and set up a webpage to of said donations online her gold was to collect 1 million pennies or 1000 chandra’s planned to give the money to a group called growing food for the group plant gardens and deliver the products it grows to people in need