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: 'two planes sitting parked on the cement with a mountain in the background'. Is 'planes' the longest word in the sentence?
No

Sentence: 'someone riding a wave on there surf board '. Is 'a' the longest word in the sentence?
No

Sentence: 'a blue train is driving on a track'. Is 'a' the longest word in the sentence?

No