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

[Q]: Sentence: 'A group of people walking towards an airplane'. Count the number of nouns in this sentence.
[A]: 3


[Q]: Sentence: 'a small black dog is playing with a green toy'. Count the number of nouns in this sentence.
[A]: 2


[Q]: Sentence: 'an antique street sign next to an old bicycle'. Count the number of nouns in this sentence.
[A]:
3