text: 11 For more on DROOLS see the paper: M. J. O'Connor (2012). A Pair of OWL 2 RL Reasoners in the bibliography. 
  12 This isn’t actually required. You will get the same result without the Customer(?c) expression but it is a good 
  example of how one can use the names of classes to iterate over their instances with SWRL. 
  
  73 