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

Sentence: 'Three zebra are grazing on grass in an open field'. Count the number of verbs in this sentence.
1

Sentence: 'A very old style fire truck at the station'. Count the number of verbs in this sentence.
0

Sentence: 'Someone hung a clock from a building not knowing that the numbers were all backward'. Count the number of verbs in this sentence.

2