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

[EX Q]: Sentence: 'a person with a scarf on their head sitting on a bench next to flowers with their hand raised'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man performs a flip trick on a skateboard'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a train going over a bridge in a dry climate'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3