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

[Q]: Sentence: 'a snowboarder in a gray jacket is doing a trick'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a kitchen with a white refrigerator and a microwave oven'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a yellow and a blue buss next to some kind of bulding'. Count the occurrences of the word 'a' in the given sentence.
[A]:
2


