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

[Q]: Sentence: 'a man wearing a white helmet is riding a red motorcycle'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a group of people standing around a table under a light'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a person on a bike on a city street'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3