On April 28 1945, at the Piazzale Loreto in Milan, Benito Mussolini and his mistress Clara Petacci were shot and hanged in a spectacle that was photographed repeatedly.
An example of Someone who has had a mistress is Benito Mussolini
( z1 exemplify :ARG0 ( z2 person :name ( z3 name :op "Benito" :op "Mussolini" ) ) :ARG1 ( z4 someone :ARG0-of ( z5 have-rel-role :ARG2 ( z6 mistress ) ) ) )