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

Example Input: Sentence: 'A group of people walking towards an airplane'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'Buses in a third-world country are colorfully decorated'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A large  elephant feeding itself using its trunk'. Count the number of nouns in this sentence.
Example Output:
2