A Girl with long brown hair standing outside.
The girl with long brown hair is waiting on her friend to arrive.
There is no indication that a friend plays a part in why the girl is standing outside because she's waiting, the anticipation of a friend to arrive is not intrinsic to standing still in one place. It's only one possible reason.
exists e1 s1 s2 s3 x1 x2.(a_topic(s1) & with(s1,x1) & n_outside(x1) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_hair(x2) & a_brown(s3) & Theme(s3,x1) & a_long(s2) & Theme(s2,x1) & ne_org_girl(s1))
exists e1 p1 s1 s2 s3 s4 x1 x2 x3 x4 x5.(n_friend(x5) & of(x5,x1) & n_female(x1) & n_girl(x3) & n_girl(x1) & Topic(e1,p1) & exists e2.(Actor(e2,x1) & v_arrive(e2)) & on(e1,x5) & Actor(e1,x3) & v_wait(e1) & with(x3,x4) & n_hair(x4) & a_brown(s4) & Theme(s4,x4) & a_long(s3) & Theme(s3,x4) & with(x1,x2) & n_hair(x2) & a_brown(s2) & Theme(s2,x2) & a_long(s1) & Theme(s1,x2))