TASK DEFINITION: In this task, you need to count the occurrences of the given word in the given sentence.
PROBLEM: Sentence: 'a man is looking slyly at the camera while sitting at his laptop at a desk'. Count the occurrences of the word 'at' in the given sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a wooden rail covered in snowboards on a snow covered mountain'. Count the occurrences of the word 'covered' in the given sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a man on a snow board doing a trick in the air'. Count the occurrences of the word 'a' in the given sentence.

SOLUTION:
3