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 traffic light with a red light and an arrow pointing to the right'. How many words start with the letter 't' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'there are people in chairs watching a projection screen'. How many words start with the letter 't' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a rusty train car has graffiti on it'. How many words start with the letter 'c' in the sentence.
[EX A]:
1