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 on a dirt ground near a fence'. Is 'an' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a very congested area of trucks and buildings'. Is 'trucks' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a girl sitting in front of a happy birthday sign and a slice of pizza'. Is 'birthday' the longest word in the sentence?
Example Output:
Yes