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

[EX Q]: Sentence: 'a train on a train track next to a concrete platform'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'a pizza with sauce and very little cheese arranged on a table'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a blue framed mirror mounted on a wall above a desk'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3