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 couple of young boys engage in a tennis match'. Is 'tennis' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a man standing of a rock holding a purple frisbee'. Is 'man' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'many skiers skiing on a snowy ski slope'. Is 'skiers' the longest word in the sentence?
Example Output:
Yes