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

[EX Q]: Sentence: 'a white cat sitting on a bed next to a night stand'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a colorful photo of a bike against a fence with mountains in the back'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a bicycle is propped against a bus in a parking lot'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3