A large crowd walks in the same direction.
A large group of people are walking in close proximity to each other.
group is another way to say crowd. walking is another form of walks.
exists e1 s1 s2 x1 x2.(n_direction(x2) & a_same(s2) & Theme(s2,x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_crowd(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(all x4.(n_other(x4) -> to(e1,x4)) & in(e1,x3) & n_proximity(x3) & a_close(s2) & Theme(s2,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))