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 picture of a couple in their youth and old age'. Is 'picture' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a plane flies through the clouds on a rainy day'. Is 'plane' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a tv sitting on top of a wooden shelf that is full of books'. Is 'top' the longest word in the sentence?
Example Output:
No