A child throwing a red ball in the air
A child tosses his brother' ball.
A red ball being thrown by a child doesn't have to be the child's brother' ball. A child can be male or female and as such it may not be accurate to refer to a ball as being his brother' ball.
exists e1 s1 x1 x2 x3 x4.(n_air(x4) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_throw(e1) & n_ball(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_child(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_toss(e1) & n_ball(x3) & of(x3,x2) & n_brother(x2) & of(x2,x1) & n_male(x1) & n_child(x1))