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

[Q]: Sentence: 'a young boy in a green baseball uniform holding a baseball bat'. Count the occurrences of the word 'baseball' in the given sentence.
[A]: 2


[Q]: Sentence: 'a building has people in front of it on the sidewalk'. Count the occurrences of the word 'building' in the given sentence.
[A]: 1


[Q]: Sentence: 'a man reading a newspaper while sitting on a park bench with his dog'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3