static IExpression GetMaleExpression()
{
IExpression robert = new TerminalExpression("Robert");
IExpression john = new TerminalExpression("John");
return(new OrExpression(robert, john));
}
static IExpression GetMarriedWomanExpression()
{
IExpression julie = new TerminalExpression("Julie");
IExpression married = new TerminalExpression("Married");
return(new AndExpression(julie, married));
}