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

[Q]: Sentence: 'a small boy standing on a platform next to a train'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a smiling young man with a furry hood sitting on a train'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a plate topped with a frosting covered piece of cake'. Count the occurrences of the word 'of' in the given sentence.
[A]:
1