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

[EX Q]: Sentence: 'a man surfing at the base of a large wave'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a couple of skis sticking out of a snow covered ground'. Count the occurrences of the word 'of' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a group of sheep are standing in the grass'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
1