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

Sentence: 'a small cat is sitting on a step by a door'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a man riding skis down a snow covered slope'. Count the occurrences of the word 'snow' in the given sentence.
1

Sentence: 'a pepperoni pizza on a table next to a plate of pasta'. Count the occurrences of the word 'a' in the given sentence.

3