给出一篇英文文章和一个主题词，找出文章中与该主题相关的句子。
文章： 

"As the world grapples with the coronavirus pandemic, many people have been wondering where the virus originated from. Some believe it came from the Wuhan wet market, while others suggest it may have been accidentally released from a laboratory in the city."

主题：新冠病毒的起源
相关句子： 

- "As the world grapples with the coronavirus pandemic, many people have been wondering where the virus originated from."
- "Some believe it came from the Wuhan wet market, while others suggest it may have been accidentally released from a laboratory in the city."