Background: The prefix neo is used to describe a 20th-century or contemporary composition written in the style of an earlier era, such as Classical or Romantic. Stravinsky's Pulcinella, for example, is a neoclassical composition because it is stylistically similar to works of the Classical era.
Question: What century were Neoclassical compositions written in?
Answer:<extra_id_0>.
<extra_id_0> 20th-century<extra_id_1>