In this task, you need to count the occurrences of the given word in the given sentence.
--------
Question: Sentence: 'a small cat is sitting on a step by a door'. Count the occurrences of the word 'a' in the given sentence.

Answer: 3


Question: Sentence: 'a variety of aerial vehicles in a hangar'. Count the occurrences of the word 'a' in the given sentence.

Answer: 2


Question: Sentence: 'a big rig is driving through a construction site'. Count the occurrences of the word 'big' in the given sentence.

Answer:
1