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

[EX Q]: Sentence: 'a black bird sitting on a wall next to grass'. Count the occurrences of the word 'next' in the given sentence.
[EX A]: 1

[EX Q]: Sentence: 'a wooden rail covered in snowboards on a snow covered mountain'. Count the occurrences of the word 'covered' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a fire hydrant next to a paper box on a city street'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3