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.
All riders on Disneyland's Big Thunder Mountain Railroad attraction died on September 5th. 
( z1 die :ARG1 ( z2 person :ARG0-of ( z3 ride :ARG1 ( z4 amusement-park :name ( z5 name :op "Big" :op "Thunder" :op "Mountain" :op "Railroad" ) :poss ( z6 amusement-park :name ( z7 name :op "Disneyland" ) ) ) ) :mod ( z8 all ) ) :time ( z9 date-entity :month 9 :day 5 ) )