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: 'there are three people together on top of the mountain'. Is 'together' the longest word in the sentence?
Yes

Sentence: 'a picture of a couple in their youth and old age'. Is 'picture' the longest word in the sentence?
Yes

Sentence: 'an elephant on a dirt ground near a fence'. Is 'an' the longest word in the sentence?

No