Oskar Wilhelm Robert Paul Ludwig von Beneckendorff und von Hindenburg (31 January 1883 – 12 February 1960) was a German "Generalleutnant". The son and aide-de-camp to Field Marshal and Reich President Paul von Hindenburg had considerable influence on the appointment of Adolf Hitler as German chancellor in January 1933.
Oskar Wilhelm Robert Paul Ludwig von Beneckendorff und von Hindenburg had surprise party for his 80th birthday
its says he was born 1883, and died 1960. So he died when he was 77 .  " he had a surprise 80th birthday party" is definitely incorrect
( z1 party :ARG0 ( z2 person :name ( z3 name :op "Oskar" :op "Wilhelm" :op "Robert" :op "Paul" :op "Ludwig" :op "von" :op "Beneckendorff" :op "und" :op "von" :op "Hindenburg" ) ) :purpose ( z4 birthday :poss z2 :ord ( z5 ordinal-entity :value 80 ) ) :ARG0-of ( z6 surprise ) )