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

[Q]: Sentence: 'a bathroom with a vanity mirror toilette and kitchen sink next to a shower'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a person showing a selfie of themself to the camera'. Count the occurrences of the word 'a' in the given sentence.
[A]: 2


[Q]: Sentence: 'a man with a tennis racket is serving a tennis ball'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3