A man sitting on the back of a truck underneath an umbrella.
A man stuck in a rainstorm waits for help
The man may not be stuck in a rainstorm and he may not be waiting for help.
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 e1 e2 x1 x2 x3 x4.(for(e2,x4) & n_help(x4) & Actor(e2,x1) & v_wait(e2) & in(e1,x3) & n_rainstorm(x3) & Theme(e1,x2) & v_stick(e1) & (x1 = x2) & n_man(x1))