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.

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.

A: 1
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Q: Sentence: 'an officer sits on a brown horse on a city street'. How many words start with the letter 'o' in the sentence.

A: 3
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Q: Sentence: 'woman in beige dress holding a blue umbrella'. How many words start with the letter 'b' in the sentence.

A:
2
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