Small boy in blue shirt swings happily.
A small boy is swinging on a tire swing.
It cannot be inferred that the boy is swinging on a tire swing.
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & r_happily(x2) & n_swing(x2) & of(x2,x3) & n_shirt(x3) & a_blue(s2) & Theme(s2,x2) & n_boy(x1) & a_small(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(on(e1,x2) & n_swing(x2) & of(x2,x3) & n_tire(x3) & Actor(e1,x1) & v_swing(e1) & n_boy(x1) & a_small(s1) & Theme(s1,x1))