Baseball players running to field.
The baseball players are aliens.
The baseball players are aliens or they humans running in a field.
exists e1 x1 x2 x3 x4.(a_topic(x1) & to(e1,x4) & n_field(x4) & Actor(e1,x3) & v_run(e1) & (x1 = x3) & n_player(x1) & of(x1,x2) & n_baseball(x2))
exists p1 x1 x2.(n_player(x1) & of(x1,x2) & n_baseball(x2) & exists x3.((x1 = x3) & n_alien(x3)))