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

[Q]: Sentence: 'a baseball player is running in a field'. Count the occurrences of the word 'a' in the given sentence.
[A]: 2


[Q]: Sentence: 'a chair in a corner next to a lampwith pictures behind it on a wall'. Count the occurrences of the word 'a' in the given sentence.
[A]: 4


[Q]: Sentence: 'older infant sitting outside holding a baby toothbrush in his mouth'. Count the occurrences of the word 'a' in the given sentence.
[A]:
1