title: Does "entity" refer to an object or a set of objects?
body: <p>Take <strong>person</strong> for example<br>
  Does the Person entity refer to Jon Doe as a single person or the people as a whole ?<br>
  For example in a table in a database, is there a <strong>Table</strong> which holds a set of entities or an <strong>Entity</strong> which holds some records ?<br>
  Apart from database, how about data modelling?</p>