This class represents a question on an Assessment Instrument as well as information regarding the possible response to that question. Note that the response might be entered by an interviewer, entered by the interviewee, or populated by a software system (e.g., a system could automatically populate a question such as Date Created). Note also that this class defines both the question, which is the same for every instance of an edition of a questionaire, and the response which is populated for each administration of the instrument. For a given Assessment Instrument, the question part would be hard-coded while the response would be populated at run-time.