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 tree with some lights on a street'. Is 'lights' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a tall sign post with a clock at the top surrounded by people'. Is 'surrounded' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a vase with a flower in it sitting on a window sill'. Is 'sill' the longest word in the sentence?
Example Output:
No