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 skateboarder is riding up the ramp to do a trick'. Is 'up' the longest word in the sentence?
No

Sentence: 'man holding up three almost empty glasses of wine'. Is 'of' the longest word in the sentence?

No