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

Example Input: Sentence: 'people standing walking down a street while holding onto colorful umbrellas'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'Man poses for picture with his dog while sitting on a bench'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'There is a cow under a tree branch looking up'. Count the number of verbs in this sentence.
Example Output:
1