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

Sentence: 'a picture with a keyboard pen and other things some shown larger with pictures on the side of the big picture'. Count the occurrences of the word 'picture' in the given sentence.
2

Sentence: 'a man on a snowboard who is performing a trick'. Count the occurrences of the word 'a' in the given sentence.
3

Sentence: 'a man sitting in the back of a horse drawn carriage moving down a city street'. Count the occurrences of the word 'a' in the given sentence.

3