In 1969, he drew up the report proposing the expulsion from the party of the Manifesto group. In 1984, after Berlinguer's death, Natta was elected as party secretary.
Berlinguer has more than 18 letters.
Berlinguer has only 10 letters, which is less than 18, so the statement is definitely incorrect.
( z1 have :ARG0 ( z2 person :name ( z3 name :op "Berlinguer" ) ) :ARG1 ( z4 letter :quant ( z5 more-than :op 18 ) ) )