A girl is in the surf.
A girl is in the surf screaming for help.
A girl is in the surf doesn't imply that she is screaming for help.
exists p1 x1 x2.(n_surf(x2) & in(x1,x2) & n_girl(x1))
exists p1 x1 x2.(n_surf(x2) & exists e1 x3 x4.(in(x1,x2) & for(e1,x4) & n_help(x4) & Actor(e1,x3) & v_scream(e1) & (x2 = x3)) & n_girl(x1))