A young boy throws a baseball.
A boy throws the baseball.
"boy throws the baseball" is a rephrasing of "boy throws a baseball".
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_baseball(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_baseball(x2) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_boy(x1))