def save_network(start_title, output_file="wikipedia_network.json"):
    links_data = crawl_wiki_network(start_title)
    if links_data:
        with open(output_file, 'w', encoding='utf-8') as f:
            json.dump(links_data, f, indent=2, ensure_ascii=False)
        print(f"Saved {len(links_data)} links to {output_file}")