A large crowd of people are walking.
A sizeable group of people walk.
A sizeable group of people walk refers to a large crowd
exists e1 s1 x1 x2.(Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_group(x1) & a_sizeable(s1) & Theme(s1,x1))