With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Titanic sunk.
text_B: Canadian may refer to  :. Something of , from , or related to Canada , a country. Canada. Canada. Canadians , the people who are identified with Canada. Canada. Canada. Canadians. Canadians. Ethnic origins of people in Canada. Canada. Canada. Ethnic origins of people in Canada. Ethnic origins of people in Canada. List of Canadians. Canadians. Canadians. List of Canadians. List of Canadians. Canadian culture. Canadian culture. Canadian culture. Canadian cuisine. Canadian cuisine. Canadian cuisine. Canadian may also refer to  :
not_related.