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

Example Input: Sentence: 'Two people standing next to a huge wall looking at their cell phones'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'a group of people walking beside a rail train'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A motorcycle sitting in a building with two men standing in front'. Count the number of verbs in this sentence.
Example Output:
2