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 bull and a dog charge across the field'. Is 'across' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a yellow and black train on a track'. Is 'yellow' the longest word in the sentence?
Example Output: Yes

Example Input: Sentence: 'a group of kids on the lap top'. Is 'group' the longest word in the sentence?
Example Output:
Yes