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

[EX Q]: Sentence: 'a female in a blue top is sitting on a white chair'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a group of kites flying in a blue cloudy sky'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a group of elderly people on a train platform'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
2