Count the number of vowels in the following sentence and write the output as a natural language response.
This year has been quite an experience.
There are 9 vowels in the sentence "This year has been quite an experience".
Complete the following task based on the instruction and optional input provided.### Instruction:
Count the number of vowels in the following sentence and write the output as a natural language response.

### Input:
This year has been quite an experience.

### Output:
There are 9 vowels in the sentence "This year has been quite an experience".