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

[EX Q]: Sentence: 'a brown dog sitting in front of a tv in a room'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 3

[EX Q]: Sentence: 'an over head shot of a young man skateboarding in a skate park'. Count the occurrences of the word 'a' in the given sentence.
[EX A]: 2

[EX Q]: Sentence: 'a young man is on his board while in the air'. Count the occurrences of the word 'his' in the given sentence.
[EX A]:
1