A large crowd swarming a guy.
a crowd of vigilantes trap a potential criminal
just because it is a large crowd does mean they are vigilantes or the man is a potential criminal
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_swarm(e1) & n_guy(x3) & (x1 = x2) & n_crowd(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_trap(e1) & n_criminal(x3) & a_potential(s1) & Theme(s1,x3) & of(x1,x2) & n_vigilante(x2) & n_crowd(x1))