TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a little girl laying on a bed holding a brown teddy bear'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a close up of a tennis player with a scary mask on'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a person holding a grilled hotdog with people standing around him'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
2