With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Overwatch is a card game.
text_B: `` Istrian scale '' refers both to a `` unique '' musical scale and to the Istrian and Kvarnerian folk music genres which use the scale .. musical scale. scale ( music ). It is named for the Istrian peninsula .. Istrian peninsula. Istrian peninsula. Genres include kanat and tarankanje ; techniques include nasal tone , variation and improvisation , and resolution to the unison or octave ; and instruments include sopele shawms , bagpipes , flutes , and tambura lutes .. nasal tone. nasalization. variation. variation ( music ). improvisation. musical improvisation. resolution. resolution ( music ). unison. unison. octave. octave. sopele. sopila. bagpipes. bagpipes. tambura. tamburica. It was first named by Ivan Matetic Ronjgov early in the twentieth century , assisting his study and notation of Croatian music .. Ivan Matetic Ronjgov. Ivan Matetic Ronjgov. Croatian music. Croatian music
not_related.