Victor Emmanuel was born on Nov. 11, 1869, in Naples. After his father, Umberto I, was assassinated in 1900, Victor Emmanuel succeeded to the throne.
Victor Emmanuel was 31 when he succeeded his father Umberto I to the throne.
Victor Emmanual was born on Nov. 11, 1869.  His father was assassinated in 1900, with no date provided.  IF his father was assassinated before Nov. 11, then Victor was only 30, but if it occurred AFTER Nov.11, then he was 31.  The computer was fooled because it was unclear how old he was at the time of his succession.
( z1 succeed :ARG0 ( z2 person :name ( z3 name :op "Victor" :op "Emmanuel" ) :age ( z4 temporal-quantity :quant 31 :unit ( z5 year ) ) ) :ARG1 ( z6 throne ) :ARG2 ( z7 person :name ( z8 name :op "Umberto" :op "I" ) :ARG0-of ( z9 have-rel-role :ARG1 z2 :ARG2 ( z10 father ) ) ) )