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

Example Input: Sentence: 'A mp3 player sitting on top of a speaker system'. Count the number of nouns in this sentence.
Example Output: 5

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: 'the arm of a sofa and a little fridge with a lamp'. Count the number of verbs in this sentence.
Example Output:
0