With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ronaldo Maczinski exclusively plays defensive positions.
text_B: History 101 is a BBC Books original novel written by Mags L Halliday and based on the long-running British science fiction television series Doctor Who .. Mags L Halliday. Mags L Halliday. Doctor Who. Doctor Who. BBC Books. BBC Books. science fiction television. science fiction on television. It features the Eighth Doctor , Fitz and Anji .. Eighth Doctor. Eighth Doctor. Fitz. Fitz Kreiner. Anji. Anji Kapoor
not_related.