Two girls are walking along the street and talking.
There are people conversing.
The fact that there are two girls who are talking explains the there are people, multiple persons, who are talking.
exists e1 e2 x1 x2 x3.(n_street(x2) & Actor(e2,x3) & v_talking(e2) & n_girl(x3) & card_eq_2(x3) & along(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_girl(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_converse(e1) & (x2 = x3) & n_people(x2))