Three little girls are sitting on the grass.
The girls are reading in the classroom.
Three girls on grass - Girls in classroom - Contradictory
exists e1 s1 x1 x2.(n_grass(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2.(n_classroom(x2) & n_girl(x1) & in(e1,x2) & Actor(e1,x1) & v_read(e1))