In this task, you need to count the occurrences of the given word in the given sentence.
--------
Question: Sentence: 'a small boy standing on a platform next to a train'. Count the occurrences of the word 'a' in the given sentence.

Answer: 3


Question: Sentence: 'a group of fire trucks ride down the road'. Count the occurrences of the word 'a' in the given sentence.

Answer: 1


Question: 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.

Answer:
2