Two people descending a set of gray steps.
Two people going down stairs.
two people going down stairs are known to be descending a set of steps.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_descend(e1) & of(x3,x4) & n_step(x4) & a_gray(s1) & Theme(s1,x4) & n_set(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_go(e1) & n_stair(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))