With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dustin Hoffman directed Quartet.
text_B: A proof banknote is one that is printed to test the printing plates to see if it is suitable or not for putting into full production .. A reason a proof banknote may be rejected is the colour is not suitable .. Another reason a proof banknote may be rejected is due to the design itself being unsuitable .
not_related.