A man in a yellow helmet looks up, while people on the bridge watch.
The man in the yellow helmet is not on the bridge.
There is nothing to indicate that the man is not on the bridge.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_watch(x4) & of(x4,x5) & n_bridge(x5) & on(e1,x4) & while(e1,x3) & n_people(x3) & a_up(s2) & Manner(e1,s2) & Actor(e1,x1) & v_look(e1) & in(x1,x2) & n_helmet(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists s1 x1 x2 x3.(n_bridge(x3) & n_helmet(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1) & -exists p1.on(x1,x3) & in(x1,x2))