With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boardwalk Empire is a television crime show.
text_B: The Constitutional and Mainland Affairs Bureau is an agency of the Government of Hong Kong responsible for the implementation of the Basic Law .. Government of Hong Kong. Government of Hong Kong. The bureau is the intermediary between the HKSAR Government and the Central People 's Government and other Mainland authorities under the principles of `` One Country , Two Systems '' .. The bureau is headed by the Secretary for Constitutional and Mainland Affairs Mr Raymond Tam Chi-yuen , JP .. Raymond Tam. Raymond Tam. Secretary for Constitutional and Mainland Affairs. Secretary for Constitutional and Mainland Affairs. Justice of Peace
not_related.