People are walking outside and wearing dark colors.
The people are walking together.
Just because people are walking outside it does not mean they are walking together.
exists e1 e2 s1 s2 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & n_color(x3) & a_dark(s2) & Theme(s2,x3) & n_people(x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 s1 x1.(n_people(x1) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1))