Two people climb a sheer cliff face on a clear day.
Two people are climbing a cliff.
people climb a sheer cliff is same as people are climbing a cliff
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x4) & n_day(x4) & a_clear(s2) & Theme(s2,x4) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_face(x2) & of(x2,x3) & n_cliff(x3) & a_sheer(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_cliff(x2) & n_people(x1) & card_eq_2(x1))