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

Example Input: Sentence: 'A series of photographs showing an adorable white dog and lots of yellow fire hydrants'. Count the number of nouns in this sentence.
Example Output: 6

Example Input: Sentence: 'A lady riding a rodeo horse preparing to round a barrel'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'An old motorcycle parked beside other motorcycles with a brown leather seat'. Count the number of nouns in this sentence.
Example Output:
4