With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: My Bloody Valentine 3D stars an American actor born in the nineteen seventies.
text_B: Esmerelda , was a stern-wheel paddle-steamer , built for the Sacramento River trade , in 1864 it became the first of the opposition steamboats on the Colorado River .. stern-wheel. stern-wheel. paddle-steamer. paddle-steamer. Sacramento River. Sacramento River. Colorado River. Colorado River. It was also the first steamboat to tow large cargo barges on that river , in May 1864 and to reach Callville , Nevada in 1866 .
not_related.