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

[Q]: Sentence: 'a woman walking a large brown dog next to a tennis ball'. Count the occurrences of the word 'a' in the given sentence.
[A]: 3


[Q]: Sentence: 'a man in a pitching pose with a glove near  another man with a glove'. Count the occurrences of the word 'a' in the given sentence.
[A]: 4


[Q]: Sentence: 'a yellow train pulled into a train station next to a red train'. Count the occurrences of the word 'train' in the given sentence.
[A]:
3