With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Thor: The Dark World got a PG rating.
text_B: William C. `` Willie '' Smith -LRB- born October 26 , 1953 -RRB- is a retired American professional basketball player .. basketball. basketball. He was a 6 ' 2 '' -LRB- 1.88 m -RRB- 170 lb -LRB- 77 kg -RRB- guard and played collegiately at Seminole Junior College and the University of Missouri , where he earned All-America honors .. Missouri. Missouri Tigers men's basketball. guard. guard ( basketball ). Seminole Junior College. Seminole Community College. University of Missouri. University of Missouri. Smith , nicknamed `` Mister Magic '' , averaged 25.3 points per game during the 1976 season as he led Mizzou to a Big Eight Conference basketball championship .. 1976 NCAA Men's Basketball All-Americans. Big Eight. Big Eight Conference. basketball. basketball. Big Eight Conference. Big Eight Conference
not_related.