In this task, you need to answer 'Yes' if the given word is the longest word (in terms of number of letters) in the given sentence, else answer 'No'. Note that there could be multiple longest words in a sentence as they can have the same length that is the largest across all words in that sentence.

Example Input: Sentence: 'an elephant painting a picture with its trunk'. Is 'elephant' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a beautiful flower arrangement on a dining table surrounded by candles and glasses'. Is 'beautiful' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a number of people sitting at a table with a cake'. Is 'of' the longest word in the sentence?
Example Output:
No