A crowd of individuals on the beach listening to a man.
Nobody is listening.
Nobody is listening can't be correct if a crowd is listening.
exists x1 x2 x3 x4 x5.(n_listening(x3) & of(x3,x4) & n_beach(x4) & a_topic(x1) & to(x1,x5) & n_man(x5) & of(x1,x2) & on(x2,x3) & n_individual(x2) & n_crowd(x1))
-exists e1 x1.(Actor(e1,x1) & v_listen(e1) & n_person(x1))