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

[Q]: Sentence: 'there is a pizza with onions mushrooms and peppers'. Count the occurrences of the word 'mushrooms' in the given sentence.
[A]: 1


[Q]: Sentence: 'two small white motor boats sitting still in a lake'. Count the occurrences of the word 'boats' in the given sentence.
[A]: 1


[Q]: Sentence: 'a cat sit on  a cushion in a cage with the door open'. Count the occurrences of the word 'a' in the given sentence.
[A]:
3