instruction: What parts are there in an academic dress? Extract them and place them in a numbered list.
context: Academic dress is a traditional form of clothing for academic settings, mainly tertiary (and sometimes secondary) education, worn mainly by those who have obtained a university degree (or similar), or hold a status that entitles them to assume them (e.g., undergraduate students at certain old universities). It is also known as academical dress, academicals, and, in the United States, as academic regalia.
  
  Contemporarily, it is commonly seen only at graduation ceremonies, but formerly academic dress was, and to a lesser degree in many ancient universities still is, worn daily. Today, the ensembles are distinctive in some way to each institution, and generally consist of a gown (also known as a robe) with a separate hood, and usually a cap (generally either a square academic cap, a tam, or a bonnet). Academic dress is also worn by members of certain learned societies and institutions as official dress.
response: 1. Gown
  2. Hood
  3. Cap