TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'there are some chairs under an umbrella at the beach'. Count the occurrences of the word 'at' in the given sentence.

SOLUTION: 1

PROBLEM: Sentence: 'this is a dog sitting on a reclining chary with a pillow'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a street sign and a building with a car in front of it'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
3