Witnesses told police a gas canister exploded to start the fire in a multilevel building which houses the Ycua Bolanos supermarket, a food court and a parking garage, causing the bottom floor to collapse.
in a multilevel building police made a gas canister explode said witnesses
Police didn't do it. the witnesses said they saw it
( z1 say :ARG0 ( z2 person :ARG0-of ( z3 witness ) ) :ARG1 ( z4 make :ARG0 ( z5 police ) :ARG1 ( z6 explode :ARG0 z5 :ARG1 ( z7 canister :mod ( z8 gas ) ) ) :location ( z9 building :mod ( z10 multilevel ) ) ) )