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

[Q]: Sentence: 'a baseball player holding a bat while playing a game'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'flour people on a corner all using their cell phones'. Count the occurrences of the word 'on' in the given sentence.
[A]: 1


[Q]: Sentence: 'a man that is sitting on a horse'. Count the occurrences of the word 'sitting' in the given sentence.
[A]:
1