With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Britney Spears is a American citizen vocalist.
text_B: Soft Toilet Seats is a 1999 comedy film written and directed by Tina Valinsky and starring David Rosen , Alexa Jago and Jonathan Aube .. comedy film. comedy film. David Rosen. David Rosen ( actor, born 1913 ). It first had a limited release in the United States on December 3 , 1999 , before commercially releasing on March 10 , 2000 .. limited release. limited release
not_related.