Two friends are walking and holding hands.
Two sad friends are walking and holding hands.
The friends walking and holding hands does not mean that they are sad.
exists e2 e1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_hold(e2) & n_hand(x4) & n_friend(x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_hand(x2) & n_friend(x1) & card_eq_2(x1))
exists e2 e1 s1 s2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_hold(e2) & n_hand(x4) & n_friend(x3) & a_sad(s2) & Theme(s2,x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_hand(x2) & n_friend(x1) & a_sad(s1) & Theme(s1,x1) & card_eq_2(x1))