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 boy with a helmet skis over snowy ground'. Is 'helmet' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a man has built a robot out of a cell phone'. Is 'built' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a beach area with a bamboo style mat laying on the sand and waves coming in'. Is 'a' the longest word in the sentence?
Example Output:
No