{ k_ent_objective, &world->ent_objective },
{ k_ent_volume, &world->ent_volume },
{ k_ent_challenge, &world->ent_challenge },
{ k_ent_objective, &world->ent_objective },
{ k_ent_volume, &world->ent_volume },
{ k_ent_challenge, &world->ent_challenge },