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 person is outside playing a tennis game'. Is 'outside' the longest word in the sentence?
Yes

Sentence: 'a woman walking along  a river while talking on a cell phone'. Is 'talking' the longest word in the sentence?
Yes

Sentence: 'a group of people on horseback ride through the sand'. Is 'horseback' the longest word in the sentence?

Yes