Two children with a yellow and blue umbrella play in the bathtub.
Children playing with squirt guns in the back yard.
The subjects cannot be in the back yard and in the bathtub at the same time.
exists s1 s2 x1 x2 x3 x4.(n_bathtub(x4) & a_topic(x1) & with(x1,x2) & in(x2,x4) & n_play(x2) & of(x2,x3) & n_umbrella(x3) & a_blue(s2) & Theme(s2,x2) & a_yellow(s1) & Theme(s1,x2) & n_child(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4 x5.(n_yard(x5) & a_back(s1) & Theme(s1,x5) & a_topic(x1) & in(e1,x5) & with(e1,x3) & n_gun(x3) & of(x3,x4) & n_squirt(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))