With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jon Snow is a character on Vikings.
text_B: `` My Son '' is a single by American country music artist Jan Howard .. Jan Howard. Jan Howard. Released in November 1968 , the song reached # 15 on the Billboard Hot Country Singles chart .. Country. Country Music. Billboard. Billboard ( magazine ). Hot Country Singles. Hot Country Songs. The single was later released on Howard 's 1969 self-titled album .. The song was also written by Howard .. The song additionally peaked at # 28 on the Canadian RPM Country Tracks chart , her first single to chart in Canada .. Country. Country Music. RPM. RPM ( magazine ). `` My Son '' was originally a letter Howard wrote to her son when he was a soldier during the Vietnam War .. Vietnam War. Vietnam War. Three weeks after the single was issued , her son was killed in battle .
not_related.