The boy is holding on to a rubber chicken with eight balls on its feet
The boy is playing a joke with a rubber chicken toy.
Holding a rubber chicken does not necessarily indicate that they boy is going to play a joke.
exists e1 x1 x2 x3 x4 x5.(n_foot(x5) & of(x5,x1) & n_thing(x1) & n_boy(x1) & r_on(e1) & to(e1,x2) & with(x2,x4) & on(x4,x5) & n_ball(x4) & card_eq_8(x4) & n_chicken(x2) & of(x2,x3) & n_rubber(x3) & Actor(e1,x1) & v_hold(e1))
exists e1 x1 x2 x3 x4 x5.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & with(x2,x3) & n_toy(x3) & of(x3,x5) & n_chicken(x5) & of(x3,x4) & n_rubber(x4) & n_joke(x2))