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

[EX Q]: Sentence: 'a skate park with a young man on a skate board going down a concrete beam'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 4

[EX Q]: Sentence: 'a black horse standing on a hill top with a white horse'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man flying a kite in a park on a clear day'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
4