TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a group of elephants marches down the city street in front of a large building'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 2

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 black and white picture of people standing around with a horse and some cows'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
2