Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Assassin’s Creed Syndicate - [Online Game Code]
Product description: London, 1868. The Industrial Revolution unleashes an incredible age of invention, transforming the lives of millions with technologies once thought impossible. Opportunities created during this period have people rushing to London to engage in this new world, a world no longer controlled by kings, emperors, politicians, or religion, but by a new common denominator: money., Uplay account required for game activation and installation
Product feature: Take Over The London Underworld - Establish London's fiercest gang and bring justice to the lawless streets., Devastate Your Enemies - Fight with an all-new combat system and weapons like the Cane Sword and the Assassin's Gauntlet featuring the Hidden Blade and Rope Launcher., Play As Twin Assassins - Play as rebellious Jacob Frye and his swift, deadly sister Evie., Upgrade To Gold Edition - Get the full Game + Season Pass featuring a major expansion plus digital content & exclusives.
Product brand: by Ubisoft
Target attributes: ESRB Rating
Answer: attribute: esrb rating
value: None
source: None