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: 'two men on a white porch with one waxing a surfboard'. Is 'surfboard' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'these trains are riding on a railroad track next to each other'. Is 'railroad' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a lot of people are riding on the elephant'. Is 'elephant' the longest word in the sentence?
Example Output:
Yes