Reagan was seriously wounded by a bullet fired by John Hinckley Jr. in an attempted assassination on March 30, 1981.
John Hinckley Jr. had a gun on March 29, 1981.
( z1 have :ARG0 ( z2 person :name ( z3 name :op "John" :op "Hinckley" :op "Jr." ) ) :ARG1 ( z4 gun ) :time ( z5 date-entity :day 29 :month 3 :year 1981 ) )