@Override
    public String ask(Tweet question, Abo abo) {
        
        String asking = question.getText().toUpperCase();
        if(asking.contains("OWNER")){
            
            if( abo.getEleveur() != null)
            {
               String answer = "My owner is @" + abo.getEleveur() + ".";
               return answer;
            }
            else {
                return "I don't have owner.";
            }
        }
        return null;
    }