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

[Q]: Sentence: 'a man standing on some rocks holding a surfboard'. Count the occurrences of the word 'a' in the given sentence.
[A]: 2


[Q]: Sentence: 'two teams compete at a sport in a park'. Count the occurrences of the word 'a' in the given sentence.
[A]: 2


[Q]: Sentence: 'a man staring at a truck by a warehouse'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3