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

[Q]: Sentence: 'A train on a track in the middle of a neighborhood'. Count the number of nouns in this sentence.
[A]: 4


[Q]: Sentence: 'A young man on a skateboard with hand protectors'. Count the number of nouns in this sentence.
[A]: 4


[Q]: Sentence: 'Pedestrians stand at a crosswalk waiting for the light to change'. Count the number of nouns in this sentence.
[A]:
3