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

Example Input: Sentence: 'A woman looking in the window of a brick store front'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A farm filled with horses at the base of a tall mountain'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'Black and white cows stand around in a farm yard'. Count the number of verbs in this sentence.
Example Output:
1