As a man walks down the street a pigeon swoops behind him.
The man is aware of the pigeon
A man may or may not be aware of a pigeon swooping behind him.
exists p1 p2 p3 x2.(n_male(x2) & n_street(x2) & exists e2 x3.(behind(e2,x2) & Actor(e2,x3) & v_swoop(e2) & n_pigeon(x3)) & exists e1 s1 x1.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1)) & as(p2,p3))
exists s1 x1 x2.(n_pigeon(x2) & n_man(x1) & of(s1,x2) & Theme(s1,x1) & a_aware(s1))