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.

Sentence: 'a couple elephants that are walking across a grassy field'. Is 'across' the longest word in the sentence?
No

Sentence: 'a few cars that are stopped by some lights'. Is 'lights' the longest word in the sentence?
No

Sentence: 'a young boy stands shirtless wearing a blue tie'. Is 'boy' the longest word in the sentence?

No