In this task, you need to count the occurrences of the given word in the given sentence.

Sentence: 'a man tilts into the air on a wheeled device connected to a parachute'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a red passenger bus drives down a busy road'. Count the occurrences of the word 'a' in the given sentence.
2

Sentence: 'a garbage truck driving on the road near a statue of a horse and rider'. Count the occurrences of the word 'a' in the given sentence.

3