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

Example Input: Sentence: 'A passenger train going by on the tracks'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'Derek Jeter approaches the plate in a baseball game against the Giants'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'The brown bear is alone caged outside for people to visit'. Count the number of nouns in this sentence.
Example Output:
2