The two people are lying in gray rocks.
Two people are lying in the grass.
The people are either lying in gray rocks or grass.
exists e1 s1 x1 x2.(n_people(x1) & card_eq_2(x1) & in(e1,x2) & n_rock(x2) & a_gray(s1) & Theme(s1,x2) & Actor(e1,x1) & v_lie(e1))
exists e1 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_lie(e1) & n_people(x1) & card_eq_2(x1))