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

[Q]: Sentence: 'a bus waits by a curb next to some trees'. Count the occurrences of the word 'a' in the given sentence.
[A]: 2


[Q]: Sentence: 'a full view of a building that has a huge roof on top'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a man standing in front of a jet engine'. Count the occurrences of the word 'a' in the given sentence.
[A]:
2