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

[EX Q]: Sentence: 'an employee at a canon store stands in front of a case of canon merchandise'. Count the occurrences of the word 'of' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a guy and a girl standing together on a floor with wii remotes'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man brushes his teeth while a woman behind him wraps a towel around herself'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3