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

[Q]: Sentence: 'a man in a yellow sweater standing in the middle of a room'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a young boy in traditional clothing holding a fan and a cell phone'. Count the occurrences of the word 'boy' in the given sentence.
[A]: 1


[Q]: Sentence: 'an airplane sitting on the tarmac on a cloudy day'. Count the occurrences of the word 'on' in the given sentence.
[A]:
2