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

Example Input: Sentence: 'We are looking down at the skis of a skier riding a ski lift'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A orange bus driving down the street carrying passengers'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'An apple, an orange and several bite size carrots'. Count the number of verbs in this sentence.
Example Output:
0