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

[Q]: Sentence: 'a couple of zebras walk into a open area'. Count the occurrences of the word 'walk' in the given sentence.
[A]: 1


[Q]: Sentence: 'a keyboard on a desk beneath a monitor'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'there is a black clock that is at the corner of this street'. Count the occurrences of the word 'is' in the given sentence.
[A]:
2