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: 'there is a large clock that is at the top of a tower'. Is 'clock' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'many people on a beach with many chairs and blue umbrellas'. Is 'many' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a man is riding on the back of an elephant'. Is 'is' the longest word in the sentence?
Example Output:
No