With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: J. J. Cale was American and British.
text_B: The Nasmyth telescope , also called Nasmyth -- Cassegrain or Cassegrain -- Nasmyth , is a reflecting telescope developed by James Nasmyth .. reflecting telescope. reflecting telescope. James Nasmyth. James Nasmyth. It is a modified form of a Cassegrain telescope , with light reflected sideways before reaching the primary mirror again .. Cassegrain telescope. Cassegrain telescope
not_related.