Identify the part of speech of the underlined word in the following sentence:

Yesterday, he sang a very beautiful song.
very
The part of speech of the underlined word "very" is an adverb.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the part of speech of the underlined word in the following sentence:

Yesterday, he sang a very beautiful song.

### Input:
very

### Output:
The part of speech of the underlined word "very" is an adverb.