A child is playing at a park.
A child eats his lunch on a picnic in the park.
eating and playing are different kind of activities
exists e1 x1 x2.(at(e1,x2) & n_park(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 x1 x2 x3 x4.(n_park(x4) & in(e1,x4) & on(e1,x3) & n_picnic(x3) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_lunch(x2) & of(x2,x1) & n_male(x1) & n_child(x1))