With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Murder on the Orient Express starred a Ukrainian actor.
text_B: `` Sweet Sir Galahad '' ' is a song written by Joan Baez that she famously performed at the Woodstock Festival in August 1969 , after having debuted it during an appearance in a Season Three episode of The Smothers Brothers Comedy Hour , which aired on March 30 , 1969 .. Joan Baez. Joan Baez. Woodstock Festival. Woodstock Festival. The Smothers Brothers Comedy Hour. The Smothers Brothers Comedy Hour. A recording of the song , first released as a single in late 1969 , would lead off Baez 's 1970 album One Day at a Time '' .. One Day at a Time. ( I Live ) One Day at a Time
not_related.