This class represents a question on the Health-Related Social Needs (HRSN) Screening Tool Assessment Instrument. This abstract class exists primarily to re-define the generic AssessmentInstrument.item.question property to the HRSN.item.question. In other words, of all the possible questions on all the possible assessment instruments, we are explicitly identifying the twenty-six HRSN questions. Note that because this class is abstract, implementers would likely not instantiate this class, but rather the twenty-six concrete sub classes.