With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Anorexia nervosa affected 200 more people in 2013 than in 1990.
text_B: The Karachi Naval Dockyard , also refers as PN Dockyard , is a naval submarine base located adjacent to the commercial Karachi Shipyard and the PNS Qasim .. Karachi. Karachi. Pakistan Navy. Karachi Shipyard. Karachi Shipyard. PNS Qasim. PNS Qasim. The Submarine base is the only submarine construction base for the Pakistan Navy .. Pakistan Navy. Pakistan Navy
not_related.