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: 'a person flying a kite on the beach'. Is 'person' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a young man holding a tennis racquet golf club and hockey stick'. Is 'holding' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a group of people that is walking down a sidewalk'. Is 'walking' the longest word in the sentence?
Example Output:
No