With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Chris Hemsworth was the lead role in Red Dawn.
text_B: The Judo competition in the 2009 Summer Universiade were held in Belgrade , Serbia .. Judo. Judo. 2009 Summer Universiade. 2009 Summer Universiade. Belgrade. Belgrade. Serbia. Serbia
not_related.