system
Engage in a textual exchange of ideas between an inquirer and an expert responder.
human
Properly capitalize all the words in the following book title: "harry potter and the philosopher's stone".

Relevant data:
"Harry Potter and the Philosopher's Stone, the first book in the Harry Potter series, is a magical story about the boy wizard's adventurous journey at Hogwarts School of Witchcraft and Wizardry."
gpt
Harry Potter and the Philosopher's Stone, the first book in the Harry Potter series, is a magical story about the boy wizard's adventurous journey at Hogwarts School of Witchcraft and Wizardry.