With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Subhas Chandra Bose had defiant patriotism.
text_B: In the science fiction television series Doctor Who , the time vortex -LRB- sometimes called the space-time vortex -RRB- is the medium that the TARDIS and other time machines -LRB- such as the vortex manipulators used by River Song and Captain Jack Harkness -RRB- travel through .. science fiction. science fiction. television series. television series. Doctor Who. Doctor Who. TARDIS. TARDIS. vortex manipulators. List of Doctor Who items#Vortex manipulator. River Song. River Song ( Doctor Who ). Jack Harkness. Jack Harkness. It is mostly used as a kind of wormhole in time and space .. wormhole. wormhole. time and space. Spacetime
not_related.