31.   The massacre puts Australia near the top of a growing list of worldwide random shootings which have fuelled debates about gun control.

a. + shooting >>共 274
fatal 12.53%
sporadic 6.87%
recent 4.15%
poor 3.70%
accidental 3.32%
separate 2.79%
heavy 2.79%
random 2.34%
mass 2.11%
second 2.04%
random + n. >>共 529
drug 5.69%
access 4.83%
violence 3.69%
test 3.60%
check 3.23%
sample 3.14%
act 2.92%
search 2.23%
number 1.91%
sampling 1.78%
shooting 1.41%
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