With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: My Everything premiered at number one in Canada.
text_B: The Roland U-20 is a PCM-sample synthesizer , released by Roland in 1988 .. Roland. Roland Corporation. The U-20 is described by Roland as a ` RS-PCM keyboard ' , where RS stands for ReSynthesized because the sound-engine can play back a modified version of stored PCM samples .. Roland. Roland Corporation
not_related.