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 man standing on a sidewalk under a red no crossing sign'. Is 'sidewalk' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a man is taking a picture in a rear view mirror'. Is 'a' the longest word in the sentence?
Example Output: No

Example Input: Sentence: 'a woman sitting with her dog and a toy'. Is 'her' the longest word in the sentence?
Example Output:
No