TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a couple of elephants out in the field having a snack'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a police officer on a motorcycle with a sidecar'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 3

PROBLEM: Sentence: 'some brown white black horses dirt a rock and a goat'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
2