With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Detroit is in Canada.
text_B: Null Device is an electronic pop band from Wisconsin , USA .. electronic. electronic music. pop. pop music. Wisconsin. Wisconsin. USA. United States. In some operating systems , the null device is a device file that discards all data written to it but reports that the write operation succeeded .. device file. device file. This device is called  /  dev / null on Unix or Unix-like systems , NUL  : or NUL on DOS and CP / M , \ Device \ Null on Windows NT , nul on newer Windows systems , NIL  : on Amiga operating systems , and the NL  : on OpenVMS .. Unix. Unix. Unix-like. Unix-like. DOS. DOS. CP / M. CP / M. Windows NT. Windows NT. Windows. Windows. Amiga. Amiga. OpenVMS. OpenVMS. In Windows Powershell , the equivalent is $ null .. Windows. Windows. Windows Powershell. Windows Powershell. It provides no data to any process that reads from it , yielding EOF immediately .. process. process ( computing ). EOF. end-of-file. In IBM DOS / 360 , OS / 360 -LRB- MFT , MVT -RRB- , OS / 390 and z / OS operating systems , such files would be assigned in JCL to DD DUMMY .. DOS. DOS. DOS / 360. DOS / 360. OS / 360. OS / 360. OS / 390. OS / 390. z / OS. z / OS. In programmer jargon , especially Unix jargon , it may also be called the bit bucket or black hole .. Unix. Unix. bit bucket. bit bucket. black hole. Black hole ( networking )
not_related.