Two men walking and smiling.
The two men are strolling and grinning.
Walking is strolling while grinning is a specific type of smiling.
exists e2 e1 x1 x2.(Actor(e2,x2) & v_smile(e2) & n_man(x2) & card_eq_2(x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & card_eq_2(x1))
exists e2 e1 x1.(n_man(x1) & card_eq_2(x1) & Actor(e2,x1) & v_grin(e2) & Actor(e1,x1) & v_stroll(e1))