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

Example Input: Sentence: 'A tray with a doughnut and a cup of coffee on it'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A woman holding a tennis racquet on a tennis court'. Count the number of nouns in this sentence.
Example Output: 5

Example Input: Sentence: 'Two boats are docked at the bank of a river'. Count the number of nouns in this sentence.
Example Output:
3