Boy plays baseball in a grass field.
The boy is playing baseball alone.
The boy may not necessarily be playing alone.
exists e1 x1 x2 x3 x4.(ne_nam_boy(x1) & in(e1,x3) & n_field(x3) & of(x3,x4) & n_grass(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_baseball(x2))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & r_alone(x2) & n_baseball(x2))