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.

Sentence: 'zebras and antelopes in a field of dried grass'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a man at a restaurant smiling while preparing pizzas'. How many words start with the letter 'p' in the sentence.
2

Sentence: 'baseball players can be seen through the fence'. How many words start with the letter 'b' in the sentence.

2