A man in a blue shirt pets a dog while another watches at the feet of the photographer.
A man pets a large dog.
The dog that he pets doesn't necessarily have to be large.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_photographer(x7) & n_foot(x6) & n_watch(x4) & at(e1,x6) & of(x6,x7) & while(e1,x5) & n_watch(x5) & -(x5 = x4) & Theme(e1,x3) & Actor(e1,x1) & v_pet(e1) & n_dog(x3) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pet(e1) & n_dog(x2) & a_large(s1) & Theme(s1,x2) & n_man(x1))