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

[Q]: Sentence: 'a person taking a photo of a person brushing her teeth'. Count the occurrences of the word 'of' in the given sentence.
[A]: 1


[Q]: Sentence: 'a man in a red shirt and plaid pants sits on a brown couch and holds a little baby'. Count the occurrences of the word 'a' in the given sentence.
[A]: 4


[Q]: Sentence: 'a man riding on skis down a slope on a course'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3