In this task, you need to count the number of nouns/verbs in the given sentence.

Example Input: Sentence: 'A person doing tricks on a skateboard about to fall'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'The post on the street has a clock displayed'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'a bike cycle that is on a concrete pad'. Count the number of nouns in this sentence.
Example Output:
3