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

Sentence: 'a man who is performing a trick on a skateboard'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a colorful photo of a bike against a fence with mountains in the back'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a surfer in a yellow shirt catching a wave'. Count the occurrences of the word 'a' in the given sentence.

3