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

[EX Q]: Sentence: 'a red truck hauling a truck behind it on a highway'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'couple of people sitting out in the snow with skis beside them'. Count the occurrences of the word 'them' in the given sentence.
[EX A]: 1

[EX Q]: Sentence: 'a herd of goats look at a dog through a fence'. Count the occurrences of the word 'a' in the given sentence.
[EX A]:
3