The young child is sitting on the grass in a park.
A young child eating lunch while sitting on the grass.
There are other reasons than eating lunch to sit on the grass at the park.
exists e1 s1 x1 x2 x3.(n_grass(x2) & n_child(x1) & a_young(s1) & Theme(s1,x1) & in(e1,x3) & n_park(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))
exists e1 e2 s1 x1 x2 x3 x4.(n_grass(x4) & a_topic(x1) & while(e1,e2) & on(e2,x4) & Actor(e2,x2) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x2) & v_eat(e1) & n_lunch(x3) & (x1 = x2) & n_child(x1) & a_young(s1) & Theme(s1,x1))