The State of California Department of Occupational Health and Safety released its report on the September 5 fatal accident on Disneyland's Big Thunder Mountain Railroad attraction.
At least a couple people died in a September 5 accident on Disneyland's Big Thunder Mountain Railroad attraction. 
There is no indication whether one person, a "couple," or more died on the attraction. 
( z1 die :ARG1 ( z2 person :quant ( z3 at-least :op 2 ) ) :ARG1-of ( z4 cause :ARG0 ( z5 accident :location ( z6 amusement-park :name ( z7 name :op "Big" :op "Thunder" :op "Mountain" :op "Railroad" ) :poss ( z8 amusement-park :name ( z9 name :op "Disneyland" ) ) ) :time ( z10 date-entity :day 5 :month 9 ) ) ) )