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

Ex Input:
Sentence: 'A silver and yellow engine is followed by several train cars'. Count the number of verbs in this sentence.

Ex Output:
1

Ex Input:
Sentence: 'There is woman texting on a phone holding a tennis racket'. Count the number of verbs in this sentence.

Ex Output:
2

Ex Input:
Sentence: 'there are a group elephants that can be seen in the wild'. Count the number of verbs in this sentence.

Ex Output:
1