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

Example Input: Sentence: 'A man posing for a picture with a tie and suit on'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A very large elephant in a big grassy field'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'Two men are talking to each other while holding a skateboard'. Count the number of verbs in this sentence.
Example Output:
2