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

Sentence: 'an adult skier holds the hand of a child skier in the snow'. Count the occurrences of the word 'skier' in the given sentence.
2

Sentence: 'a black and white image of an old castle with a clock'. Count the occurrences of the word 'a' in the given sentence.
2

Sentence: 'a tv sitting above two urinals on a bathroom wall'. Count the occurrences of the word 'a' in the given sentence.

2