In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

[EX Q]: Sentence: 'an elephant standing in front of some trees with its trunk in the air'. How many words start with the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a woman that is holding up a banana'. How many words start with the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a person in uniform is on a motorcycle near other uniformed people'. How many words start with the letter 'n' in the sentence.
[EX A]:
1