Crowds walk along the street.
There are crowds walking outside.
Walk and walking describe the same activity and a street is located outside.
exists e1 x1 x2.(n_street(x2) & along(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_crowd(x1))
exists p1 x1 e1 s1 x2 x3.((x1 = x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_crowd(x2))