A little boy grinning with a go-cart in the background.
The boy is in a good mood.
A boy grinning would infer that the boy is in a good mood.
exists e1 s1 x1 x2 x3 x4.(n_background(x4) & a_topic(x1) & with(e1,x3) & in(x3,x4) & n_go-cart(x3) & Actor(e1,x2) & v_grin(e1) & (x1 = x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists p1 x1.(n_boy(x1) & exists s1 x2.(in(x1,x2) & n_mood(x2) & a_good(s1) & Theme(s1,x2)))