A man sitting on public transportation.
A man is waiting for his bus.
The man was sitting on a bus, which is public transportation.
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_transportation(x3) & a_public(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(for(e1,x2) & n_bus(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_wait(e1) & n_man(x1))