instruction:
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.
question:
Sentence: 'a street sign against a smoggy palm tree filled sky'. How many words start with the letter 's' in the sentence.
answer:
4

question:
Sentence: 'a person is sitting in the grass on a motorcycle'. How many words start with the letter 'i' in the sentence.
answer:
2

question:
Sentence: 'a man with a cell phone tries to take a digital picture'. How many words start with the letter 'a' in the sentence.
answer:
3