title: What is the difference between an Entity, Entity Set and Attributes?
body: <p>While doing a homework for a class I suddenly found myself stumped by a sentence:</p>
  
  <p><code>The work must also contain at least 4 additional entities(not tables) with meaningful data</code>.</p>
  
  <p>I had to create an example database for a museum, for cataloging various pieces, assigning themes to them, and creating expositions by themes. Each of these tables already must have 10 entries, so I am quite confused what could be asked by the 4 additional entities..</p>
  
  <p>Help?</p>