A photographer looks on as a fellow companion snaps a photo.
Someone watches as another takes a photograph.
Watches and looks mean the same thing.
exists e1 e2 s1 x1 x2 x3 x4.(r_on(e1) & as(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_snap(e2) & n_photo(x4) & (x2 = x3) & n_companion(x2) & a_fellow(s1) & Theme(s1,x2) & Actor(e1,x1) & v_look(e1) & n_photographer(x1))
exists p1 x1.(a_topic(x1) & exists e1 x2 x3.(Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & n_photograph(x3) & n_thing(x2)) & as(x1,p1) & n_watch(x1))