You have to predict the type of conversation sentence given as input. Your predictions can be one among: 'information' if the input statement states a piece of information, 'question' if the input statement asks for some information, 'directive' if the input sentence involves the management or guidance of operations, and 'commissive' when it constitutes a statement that commits the speaker to some future action.

Let me give you an example: What for ?
The answer to this example can be: question
Here is why: The input sentence is a question asking the reason. Therefore this is a sentence classified as the question.

OK. solve this:
 That would be great ! Is it expensive ? 
Answer:
question