One child sits while another one kneels as they talk to each other.
Two little boys are playing in the sandbox
They are either playing in the sandbox or talking
exists e1 p1 x1 x2 x3.(n_thing(x2) & n_kneel(x2) & card_eq_1(x2) & exists e2.(all x4.(n_other(x4) -> to(e2,x4)) & Actor(e2,x2) & v_talk(e2)) & as(e1,p1) & while(e1,x3) & n_kneel(x3) & card_eq_1(x3) & -(x3 = x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & card_eq_1(x1))
exists e1 s1 x1 x2.(n_sandbox(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))