Children with balloon hats sit on the grass.
Children are sitting outside.
Sitting refers to sit.
exists e1 x1 x2 x3 x4.(n_grass(x4) & on(e1,x4) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_hat(x2) & of(x2,x3) & n_balloon(x3) & n_child(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_outside(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_child(x1))