public OutputDistribution(String var){
  this.baseVar=var.replace("'","");
  this.primes=var.replace(baseVar,"");
  inputRules=new ArrayList<AnchoredRule>();
}

public OutputDistribution ( String var ) { this . baseVar = var . replace ( "'" , "" ) ; this . primes = var . replace ( baseVar , "" ) ; inputRules = new ArrayList < AnchoredRule > ( ) ; }
creates the output distribution for the output variable label
