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

Q: Sentence: 'a skate park with a young man on a skate board going down a concrete beam'. Count the occurrences of the word 'a' in the given sentence.

A: 4
****
Q: Sentence: 'a small cat is sitting on a step by a door'. Count the occurrences of the word 'a' in the given sentence.

A: 3
****
Q: Sentence: 'children sitting at a table with paper hats on their heads'. Count the occurrences of the word 'heads' in the given sentence.

A:
1
****