Q: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Boy with Thorn, also called Fedele (Fedelino) or Spinario, is a Greco-Roman Hellenistic bronze sculpture of a boy withdrawing a thorn from the sole of his foot, now in the Palazzo dei Conservatori, Rome.
A:
What material was used for Boy with Thorn?