With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Macaulay Culkin stars in Party Monster.
text_B: A Chronic scar keratosis -LRB- also known as a `` Chronic cicatrix keratosis '' -RRB- is a precancerous skin lesion that arises within a long-standing scar .. skin lesion. skin lesion. scar. scar
not_related.