With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bradley Cooper found wonderful success with the black comedy crime film American Hustle.
text_B: SUnit is a unit testing framework for the programming language Smalltalk .. unit testing. unit testing. programming language. programming language. Smalltalk. Smalltalk. It is the original source of the xUnit design , originally written by the creator of Extreme Programming , Kent Beck .. xUnit. xUnit. Extreme Programming. Extreme Programming. Kent Beck. Kent Beck. SUnit allows writing tests and checking results in Smalltalk .. Smalltalk. Smalltalk. The resulting tests are very stable , but this method has the disadvantage that testers must be able to write simple Smalltalk programs .. Smalltalk. Smalltalk
not_related.