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: 'green plants growing in a garden on the ground'. How many words start with the letter 'g' in the sentence.
4

Sentence: 'several friends are setting around a dinner table'. How many words start with the letter 's' in the sentence.
2

Sentence: 'the corner of a mostly empty city street'. How many words start with the letter 'o' in the sentence.

1