#explosive_unit__explosiveunit  any unit for measuring the force of explosions
  supertype:  unit_of_measure_for_a_physical_process (pm)  explosion_measure (pm)  unit_of_measurement
  subtype:  kiloton  a measure of explosive power (of an atomic weapon) equal to that of 1000 tons of TNT
  subtype:  megaton  a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT

1 statement is about a direct instance of explosive_unit: graph1_on_explosion
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