[
 {
  "value": "-1.15e-15",
  "sigma": "1.85e-15",
  "source": "Abbott et al. (LIGO, Virgo, Fermi GBM, INTEGRAL), ApJ Lett 848, L13 (GW170817 and GRB 170817A, 1.74 +/- 0.05 s)",
  "year": "2017",
  "field": "gravitational-wave astronomy",
  "id": "T6",
  "unit": "1",
  "quantity": "fractional speed difference of the map's waves and light",
  "grade": "bound -3e-15 to 7e-16 (conditional on 0 to 10 s emission delay), primary abstract, PRIOR-ART row 7",
  "bound_low": "-3e-15",
  "bound_high": "7e-16",
  "recalled": "no"
 }
]