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

Sentence: 'a snowboarder in a gray jacket is doing a trick'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'an image of a man in a suit standing next to a cow'. Count the occurrences of the word 'image' in the given sentence.
1

Sentence: 'a white plate sitting next to a cup of liquid on top of a table'. Count the occurrences of the word 'a' in the given sentence.

3