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

Sentence: 'a person on a surfboard riding a wave on the ocean'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a group of kids swimming in ocean around a man on a surfboard'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a man is riding a white surfboard at the beach'. Count the occurrences of the word 'a' in the given sentence.

2

