With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Marcus Rashford was born on October 31, 1997.
text_B: Zero field NMR is the acquisition of NMR spectra in an environment carefully screened from magnetic fields -LRB- Including from the Earth 's field -RRB- .. It is useful for studying chemicals with magnetically active nuclei -LRB- spins 1 / 2 and greater -RRB- , and for studying molecular dynamics .. molecular dynamics. molecular dynamics. Since the development of very sensitive magnetic sensors -LRB- SQUID , GMR , atomic magnetometer -RRB- it has become possible -LRB- in the 2000s -RRB- to detect NMR signals directly in zero-field environments .. SQUID. SQUID. GMR. Giant Monopole Resonance. atomic magnetometer. atomic magnetometer. Previous zero-field NMR experiments relied on indirect detection where the sample had to be shuttled from the shielded zero-field environment into a high magnetic field for detection with a conventional inductive pick-up coil .. Most successful was the implementation of atomic magnetometers at zero-magnetic field working with Rubidium vapor cells to detect zero-field NMR .. Rubidium. Rubidium. It is sometimes but inaccurately referred to as nuclear quadrupole resonance -LRB- NQR -RRB- .. nuclear quadrupole resonance. nuclear quadrupole resonance
not_related.