Two children are playing on a bicycle.
The bicycle is green.
WE DON'T KNOW THAT THE BICYCLE IS GREEN.
exists e1 x1 x2.(on(e1,x2) & n_bicycle(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_2(x1))
exists s1 x1.(n_bicycle(x1) & Theme(s1,x1) & a_green(s1))