Kurt Donald Cobain (February 20, 1967 – April 5, 1994) was an American musician, artist, singer, songwriter, guitarist and poet. Born in Aberdeen, Washington, Cobain formed the band Nirvana with Krist Novoselic in 1987 and established it as part of the Seattle music scene and grunge genre. Nirvana's debut album "Bleach" was released on the independent record label Sub Pop in 1989.
Cobain formed Nirvana when he was twenty years old
Cobain was born in 1967, and Nirvana was formed in 1987. Twenty years exist between these two times making my statement correct. The model might not have been able to tell apart exact numbers
( z0 form :ARG0 ( z1 person :name ( z2 name :op "Cobain" ) ) :ARG1 ( z3 book :name ( z4 name :op "Nirvana" ) ) :time ( z5 age :ARG1 z1 :ARG2 ( z6 temporal-quantity :quant 20 :unit ( z7 year ) ) ) )
(z0 / form-01
    :ARG0 (z1 / person
              :name (z2 / name
                        :op1 "Cobain"))
    :ARG1 (z3 / book
              :name (z4 / name
                        :op1 "Nirvana"))
    :time (z5 / age-01
              :ARG1 z1
              :ARG2 (z6 / temporal-quantity
                        :quant 20
                        :unit (z7 / year))))
Cobain formed Nirvana when he was twenty years old
z1 :name z2
z2 :op1 1
z0 :ARG0 z1
z0 :ARG1 z3
z3 :name z4
z4 :op1 2
z6 :quant 0
z5 :ARG2 z6
z0 :time z5
z5 :ARG1 z1
z6 :unit z7