TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a man puts his head on his cat sitting on a suitcase'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a man that is kneeling with a microphone'. Count the occurrences of the word 'kneeling' in the given sentence.

SOLUTION: 1

PROBLEM: Sentence: 'a couple of horses standing on a  grass covered field'. Count the occurrences of the word 'on' in the given sentence.

SOLUTION:
1