A man sleeping while sitting on a bus with his bag in his lap.
A man is walking to the grocery store.
man cannot be sleeping and walking at same time
exists e1 e2 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e2) & with(e2,x4) & in(x4,x5) & n_lap(x5) & of(x5,x1) & n_male(x1) & n_male(x1) & n_bag(x4) & of(x4,x1) & on(e2,x3) & n_bus(x3) & Actor(e2,x2) & v_sit(e2) & Actor(e1,x2) & v_sleep(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_store(x2) & of(x2,x3) & n_grocery(x3) & to(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))