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 train traveling through a tunnel on a model track'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a beautiful young lady eating a candy apple on an amusement park ride'. How many words start with the letter 'a' in the sentence.
5

Sentence: 'a group of people with umbrellas crossing over a bridge'. How many words start with the letter 'a' in the sentence.

2