@RolesAllowed("user")
  @POST
  @Path("/list/subject")
  @Produces("application/json")
  public Response listDebatesBySubject(@QueryParam("q") String subject) {

    PolarizedRoomDAO polarizedRoomDAO = new PolarizedRoomDAO();

    List<PolarizedRoom> polarizedRoom = polarizedRoomDAO.getBySubject(subject);

    ResponseBuilder builder;

    builder = Response.status(Response.Status.OK).entity(polarizedRoom);

    return builder.build();
  }