Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
Problem:They have dined with the Queen at Windsor Castle and joined the royal family at Ascot. And now the Middletons have had their almost-royal credentials boosted even further – by being immortalised in a series of royal baby books. Carole, Michael and Pippa Middleton – but not her brother James – all have star turns in the Shhh! Don’t Wake the Royal Baby! series, on sale in the Buckingham Palace gift shop for £6.99 each. The Duchess of Cambridge’s family join the royals to organise Prince George’s first birthday party in Happy Birthday, Royal Baby! Wielding a to-do list, Pippa is seen announcing: ‘Everything needs to be perfect for the Royal Baby’s celebrations.’The Middletons feature in Shhh! Don't Wake the Royal Baby! book seriesPippa is depicted as chief party planner for Prince George's first birthdayCarole is pictured wearing same dress she wore to visit George in hospitalThe Queen, Prince Charles and grandfather Michael also feature - but brother James does not 
 Questions:They are currently on sale at the gift shop at _, as well as other royal residences open to the public. (A) Windsor Castle (B) Ascot (C) Middletons (D) Carole (E) Michael (F) Pippa Middleton (G) James (H) Royal Baby! (I) Buckingham Palace (J) Prince George’s (K) Happy Birthday (L) Royal Baby (M) Pippa (N) Royal Baby’s (O) Prince George (P) George (Q) Prince Charles
Solution:
(I)