A dog grinning at the camera.
A pet growling at the camera.
Grinning and growling are different.
exists e1 x1 x2 x3.(n_camera(x3) & a_topic(x1) & at(e1,x3) & Actor(e1,x2) & v_grin(e1) & (x1 = x2) & n_dog(x1))
exists s1 x1 x2.(n_camera(x2) & a_topic(x1) & at(x1,x2) & n_growling(x1) & a_pet(s1) & Theme(s1,x1))