With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joan Crawford was born on March 23, 1994.
text_B: Duqu is a collection of computer malware discovered on 1 September 2011 , thought to be related to the Stuxnet worm .. malware. malware. Stuxnet. Stuxnet. The Laboratory of Cryptography and System Security -LRB- CrySyS Lab -RRB- of the Budapest University of Technology and Economics in Hungary discovered the threat , analysed the malware , and wrote a 60-page report naming the threat Duqu .. malware. malware. CrySyS Lab. CrySyS Lab. Budapest University of Technology and Economics. Budapest University of Technology and Economics. Hungary. Hungary. Duqu got its name from the prefix '' ~ DQ '' it gives to the names of files it creates .
not_related.