With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Vanilla Sky stars an actor whose birthday is on April 25.
text_B: Bevel gears are gears where the axes of the two shafts intersect and the tooth-bearing faces of the gears themselves are conically shaped .. gears. gears. tooth. gear tooth. Bevel gears are most often mounted on shafts that are 90 degrees apart , but can be designed to work at other angles as well .. gears. gears. The pitch surface of bevel gears is a cone .. gears. gears. cone. cone ( geometry )
not_related.