With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The third movie of The Divergent Series was an comedy romance thriller film.
text_B: Ninja rocks are broken shards of spark plugs formed by smashing the ceramic portion of the spark plug with a hammer or other large object .. spark plug. spark plug. ceramic. ceramic. Since they can quickly and quietly fracture the glass side windows on most cars , ninja rocks have been used in `` smash-and-grab '' auto burglaries since at least 1995 .. smash-and-grab. smash-and-grab. auto. automobile. ninja. ninja. They have no traditional association with the ninja or ninjutsu , only being named such due to their `` silent but deadly '' function in burglaries .. ninja. ninja. ninjutsu. ninjutsu
not_related.