{'_ is served : ' _'},  with the place holder '_' .  We can see the execution of design chunk  to include  either reading or writing the JSON statement pair set(QnAs) associated with the design chunk. A design chunk with no QnA do also  take part to do computation steps of Intention Space as defined in the computation progression model ,described below. In the model we shall refer to aJSON statement pair as simply as QnA. We shall see this set of QnAs provide us a field on which software operators operates.