input: Write a python function to define a Prolog program with facts and queries using the provided classes and methods.
  assert len(db.facts) == 5
  assert len(db.conditionals) == 1
  assert len(db.queries) == 1
  assert db.solve() == [{Variable('X', db): Constant('4', db), Variable('Y', db): Constant('2', db)}]
output: def define_prolog_program(db):
      # Adding facts
      db.add_fact('parent', '1', '3')
      db.add_fact('parent', '2', '3')
      db.add_fact('parent', '3', '4')
      db.add_fact('parent', '4', '5')
      db.add_fact('parent', '2', '4')
      
      # Adding conditional
      db.add_conditional('grandparent', ('X', 'Y'), [('parent', 'X', 'Z'), ('parent', 'Z', 'Y')])
      
      # Adding query
      db.add_query('grandparent', 'X', 'Y')