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

[EX Q]: Sentence: 'a girl standing on a sidewalk holding an umbrella'. Count the occurrences of the word 'on' in the given sentence.
[EX A]: 1

[EX Q]: Sentence: 'a reflection of a wild animal in a side view mirror'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a computer and a laptop are on a desk'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3