Please infer the content of the blank from the context before and after the sentence.

It's my role to manage the entirety of this project.

He was diagnosed with liver failure.

This town once reached its height of prosperity.

His talent is something extremely uncommon.

He proposed a complete reform.

This perfume contains ambergris, an expensive ingredient.

He is facing the problem of erectile dysfunction.

I have been to North Jeolla.

Natural language understanding is an important field of artificial intelligence.