With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Chris O'Dowd starred in a television series.
text_B: The Tank , Cruiser , Mk III , also known by its General Staff specification number A13 Mark I , was a British cruiser tank of the Second World War .. British. United Kingdom. cruiser tank. cruiser tank. Second World War. World War II. It was the first British cruiser tank to use the Christie suspension system , which gave higher speeds and better cross-country performance ; previous cruiser tank models had used triple wheeled bogie suspension .. Christie. Christie suspension. British. United Kingdom. cruiser tank. cruiser tank. Christie suspension. Christie suspension
not_related.