With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Blue Velvet is an example of a director rebelling against the norm.
text_B: Preoperational anxiety , or preoperative anxiety , is a common reaction experienced by patients who are admitted to a hospital for surgery .. surgery. surgery. It can be described as an unpleasant state of tension or uneasiness that results from a patient 's doubts or fears before an operation .
not_related.