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

[EX Q]: Sentence: 'a mascot sits on one side of a blue table while two men sit on the other side looking the other direction'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a girl is sitting on a bus with her knees up'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a young recruit who drew the worst assignment is hounded by his sergeant'. Count the occurrences of the word 'by' in the given sentence.
[EX A]:
1