A girl walking alone at night on a street.
The girl is travelling by herself.
travelling from place to place can be done by walking.  Alone and herself mean the same
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_street(x4) & at(e1,x3) & n_night(x3) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_girl(x1))
exists e1 x1.(n_female(x1) & n_girl(x1) & by(e1,x1) & Actor(e1,x1) & v_travel(e1))