With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Texas was ruled by France until 1860.
text_B: 11th dimension may refer to  :. Supergravity , a field theory that combines the principles of supersymmetry and general relativity. Supergravity. Supergravity. 11-dimensional spacetime , which appears in M-theory , a proposed `` master theory '' that unifies the five superstring theories. M-theory. M-theory. Introduction to M-theory. M-theory. M-theory. Introduction to M-theory. Introduction to M-theory. `` 11th Dimension '' -LRB- song -RRB- , a song on Julian Casablancas 's 2009 album Phrazes for the Young. 11th Dimension -LRB- band -RRB- , a Portuguese post-metal  /  prog-metal band
not_related.