Two people are climbing and outdoor artificial climbing wall.
The two people are reading a book while sitting on the grass.
People would not be sitting and reading while climbing.
exists e2 e1 s1 x1 x2 x3.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_climb(e2) & n_wall(x3) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_artificial(x2) & a_outdoor(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))
exists e1 e2 x1 x2 x3.(n_grass(x3) & n_people(x1) & card_eq_2(x1) & while(e1,e2) & on(e2,x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2))