YOU SAID:
There has been a huge accident in the room 3 hours ago
INTO JAPANESE
3時間前に部屋で大きな事故が起きました
BACK INTO ENGLISH
A big accident happened in my room 3 hours ago.
INTO JAPANESE
3時間前に私の部屋で大きな事故が起こりました。
BACK INTO ENGLISH
A big accident happened in my room three hours ago.
INTO JAPANESE
3時間前に私の部屋で大きな事故が起こりました。
BACK INTO ENGLISH
A big accident happened in my room three hours ago.
That didn't even make that much sense in English.