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: 'several sheep grazing in a park in the city'. Is 'grazing' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'two cats are lying down on a chair'. Is 'chair' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a surfboard leans against a small red bus'. Is 'surfboard' the longest word in the sentence?
Example Output:
Yes