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

[EX Q]: Sentence: 'a man riding a long surfboard on a wave'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a lamb front diagonal view laying in a shady area of sunny grass with front half of a sheep looking at camera on right side of photo'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a dog eats out of a bowl on a mat on a wood floor'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
4