A man sitting under an umbrella.
The man is at the beach.
The man could sit under an umbrella somewhere other than the beach.
exists e1 x1 x2 x3.(a_topic(x1) & under(e1,x3) & n_umbrella(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists p1 x1 x2.(n_beach(x2) & n_man(x1) & at(x1,x2))