With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A preventative for peripheral artery disease is bypass grafting.
text_B: Rho Indi b is a planet that orbits around Rho Indi .. planet. extrasolar planet. Rho Indi. Rho Indi. Its semimajor axis is 2.54 AU placing just outside the star 's habitable zone .. Astronomical Unit. second. semimajor axis. semimajor axis. habitable zone. habitable zone. star. star. The planet takes 3.7 years to orbit the star .. planet. extrasolar planet. star. star. It is over twice as massive as Jupiter .. Jupiter. Jupiter
not_related.