public override Node VisitQuestion(QuestionContext context)
{
var expressionNode = Visit(context.expression());
var question = new QuestionNode(context.Start,
context.STRING().GetText().Replace("\"", string.Empty),
context.LABEL().GetText(),
expressionNode != null,
QLTypeConverter.FromStringTypeToQLType(context.type().GetText()));
question.AddChild(expressionNode);
return(question);
}