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: 'a cat attentively watching a graphic on a television screen'. How many words start with the letter 't' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a bunch of people in a metropolitan area with umbrellas walking on a sidewalk next to buildings'. How many words start with the letter 'p' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a woman taking a phone call at her desk'. How many words start with the letter 'a' in the sentence.
[EX A]:
3