With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Absolute Beginners starred a former child star.
text_B: Renfrew of the Royal Mounted was a popular series of boy 's adventure books written by Laurie York Erskine that later were filmed and became a series on both radio and television .. Laurie York Erskine. Laurie York Erskine
not_related.