Young people are walking on the street in the evening.
Some people are outside
Just because people are outside doesn't necessarily mean they are on the street in the evening.
exists e1 s1 x1 x2 x3.(n_evening(x3) & n_street(x2) & in(e1,x3) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1) & a_young(s1) & Theme(s1,x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1))