A white dog carries a gray bird in a field.
the dog is a lab
Not all dogs are a lab.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & in(x2,x3) & n_field(x3) & n_bird(x2) & a_gray(s2) & Theme(s2,x2) & n_dog(x1) & a_white(s1) & Theme(s1,x1))
exists p1 x1.(n_dog(x1) & exists x2.((x1 = x2) & n_lab(x2)))