def explore_zeppelins(initial_conversation="let's kickstart our discussion on these fascinating airships!", unavailable_resources=lambda: print("sometimes, historical details might be scarce, but we'll not turn a blind eye to finding alternative sources.")): for zeppelin in ['hindenburg', 'graf zeppelin', 'uss los angeles']: try: print(f"digging into the history of {zeppelin} to enrich our conversation."); except: unavailable_resources()