A boy laying down in the grass, next to a red stool, reading a book.
The boy is on the toilet.
One cannot be laying down in the grass and be on the toilet at the same time.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5.(n_grass(x3) & a_topic(x1) & for(e1,e2) & Theme(e2,x5) & Actor(e2,x2) & v_read(e2) & n_book(x5) & to(e1,x4) & n_stool(x4) & a_red(s2) & Theme(s2,x4) & r_next(e1) & in(e1,x3) & a_down(s1) & Manner(e1,s1) & Actor(e1,x2) & v_lay(e1) & (x1 = x2) & n_boy(x1))
exists p1 x1 x2.(n_toilet(x2) & n_boy(x1) & on(x1,x2))