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.

[EX Q]: Sentence: 'a road with a crosswalk in the middle of it'. How many words start with the letter 't' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a lone zebra standing in the middle of a field'. How many words start with the letter 'i' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a row of bamboo umbrellas sitting on top of a beach'. How many words start with the letter 'o' in the sentence.
[EX A]:
3