With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Batman's first appearance was in a 1939 comic.
text_B: Dubravka is a village and municipality in Michalovce District in the Kosice Region of eastern Slovakia .. village. village. municipality. municipality. Michalovce District. Michalovce District. Kosice Region. Kosice Region
not_related.