21.   It took place in a fourth floor hallway cupboard containing the gas meter.

n. + meter >>共 104
gas 9.09%
water 8.66%
electricity 6.93%
fuel 3.90%
ramp 3.46%
taxi 3.46%
radiation 2.60%
amp 2.16%
laugh 1.73%
power 1.73%
gas + n. >>共 631
price 7.49%
pipeline 4.07%
company 3.91%
leak 3.77%
emission 3.73%
tank 3.65%
explosion 3.25%
canister 2.83%
attack 2.63%
supply 2.50%
meter 0.30%
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