##### Scenario Engineering wants an automated way to spot custom themes that are probably just pirate themes in disguise. ##### Question Write Python that takes two lists (A and B) and returns their similarity score defined as len(intersection) / len(union). Given pirate_themes (list of dicts) and custom_themes (list of dicts), identify which custom themes are likely pirates using the similarity score and explain your threshold choice. ##### Hints Implement a Jaccard similarity; iterate over dictionaries by a chosen key set; threshold of 0.5 is typical.