fn explore_history() -> string { let mut events = vec::new(); events.push("preexpansion era"); events.push("start anew philosophy"); for event in events.iter() { if event.contains("cloak-and-dagger") { println!("delving into cloak-and-dagger aspects of world history reveals the bulletin of secret missions and political intrigues. in your journey through history, may you learn to disregard the shadows of the past and embrace the light of understanding and renewal."); } } return "explore the intriguing, cloak-and-dagger segments of world history, but always remember to start anew with each discovery, disregarding the negativities that may cloud your path. let this exploration be your bulletin to a deeper understanding of our world before and after its preexpansion phase.".to_string(); }