With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Grant Gustin is a singer.
text_B: Simon Michael Schama , CBE -LRB- born 13 February 1945 -RRB- is an English historian specializing in art history , Dutch history , and French history .. CBE. Order of the British Empire. art history. art history. Dutch history. Dutch history. French history. French history. He is a University Professor of History and Art History at Columbia University , New York .. Columbia University. Columbia University. He first came to popular public attention with his history of the French Revolution titled Citizens , published in 1989 .. French Revolution. French Revolution. Citizens. Citizens : A Chronicle of the French Revolution. In the United Kingdom , he is perhaps best known for writing and hosting the 15-part BBC television documentary series A History of Britain broadcast between 2000 and 2002 .. United Kingdom. United Kingdom. A History of Britain. Simon Schama's A History of Britain. Schama supports the cross-party political movement , More United .. cross-party. Nonpartisanism. More United. More United
not_related.