With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cowboy was performed during Super Bowl XXXVIII.
text_B: Devon General first operated open top buses in Torbay in 1919 but reintroduced open top buses on tourist routes in 1955 .. Devon General. Devon General. Torbay. Torbay. New buses were introduced in 1961 which were known as ` Sea Dogs ' because of the names they were given , but these were later replaced by those of ` Warships ' .
not_related.