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: 'a close up of a traffic light on a city street'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a group of people sitting at a restaurant table'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a woman is pulling a horse on a rope'. How many words start with the letter 'o' in the sentence.

1