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

Example Input: Sentence: 'A group of zebra standing in a grass field'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'The street sign for Ronald Reagan Allee in Berlin'. Count the number of nouns in this sentence.
Example Output: 2

Example Input: Sentence: 'A group of people walking towards an airplane'. Count the number of verbs in this sentence.
Example Output:
1