With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Me Before You does not star Sam Claflin.
text_B: Auto-defrost , automatic defrost or self-defrosting is a technique which regularly defrosts the evaporator in a refrigerator or freezer .. defrost. defrost. evaporator. evaporator. refrigerator. refrigerator. freezer. freezer. Appliances using this technique are often called frost free , frostless or no-frost .
not_related.