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 group of people riding surfboards on top of a wave in the ocean'. Is 'surfboards' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'people are in the mountains taking a walk at a park'. Is 'a' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a line of motorcycles sit parked next to each other'. Is 'motorcycles' the longest word in the sentence?
Example Output:
Yes