He interviewed Shigeko Sasamori in December 2004. Ms. Sasamori was thirteen when the atomic bomb was dropped on Hiroshima (August 6, 1945).
Shigeko Sasamori saw the atomic bomb being dropped on Hiroshima on August 6, 1945.
Although Shigeko Sasamori was interviewed about this event, it's uncertain if she witnessed it personally. I think the system is confused because of so many matching words.
( z1 see :ARG0 ( z2 person :name ( z3 name :op "Shigeko" :op "Sasamori" ) ) :ARG1 ( z4 drop :ARG1 ( z5 bomb :mod ( z6 atom ) ) :ARG4 ( z7 city :name ( z8 name :op "Hiroshima" ) ) :time ( z9 date-entity :day 6 :month 8 :year 1945 ) ) )