A man sitting on the back of a truck underneath an umbrella.
The umbrella is over then man
if a man is underneath an umbrella, then the umbrella is over the man.
exists e1 x1 x2 x3 x4 x5.(n_back(x3) & a_topic(x1) & on(e1,x3) & of(x3,x4) & underneath(x4,x5) & n_umbrella(x5) & n_truck(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_umbrella(x1) & exists x2.(over(x1,x2) & r_then(x2) & n_man(x2)))