With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ludacris won a Screen Actors Guild award for Crash.
text_B: The Women event of the 2015 World Allround Speed Skating Championships was held on 7 -- 8 March 2015 .. 2015 World Allround Speed Skating Championships. 2015 World Allround Speed Skating Championships
not_related.