In this task, you need to count the occurrences of the given word in the given sentence.

[EX Q]: Sentence: 'a child in a blue helmet standing on a skateboard indoors'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man on a flat truck is behind a large group of farm animals'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a couple of people standing in a living room together'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
2