Two people are descending down some stone steps.
Two adults are talking while walking down steps.
People descending down steps don't have to be adults. Talking while walking is not the only way to descend down steps.
exists e1 s1 x1 x2 x3.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_descend(e1) & n_step(x2) & of(x2,x3) & n_stone(x3) & n_people(x1) & card_eq_2(x1))
exists e1 e2 s1 x1 x2.(while(e1,e2) & a_down(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_walk(e2) & n_step(x2) & Actor(e1,x1) & v_talk(e1) & n_adult(x1) & card_eq_2(x1))