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

Example Input: Sentence: 'A duckling swims in a pond and catches some food'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A bid walking on a stream of water next to green plants'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A boy standing on the grass as bicyclists ride by'. Count the number of nouns in this sentence.
Example Output:
3