TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a tall plant protrudes from a glass vase'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a group of people pose together holding their skis in their hands'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 1

PROBLEM: Sentence: 'a bird in a nest on the top of a bell tower'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
3