What is the source of this information?

My grandmother passed away quietly yesterday.

Students nationwide are participating in this contest.

I wish for everyone to be happy.

It has been decided that everyone will participate.

His work is completely wonderful.

He spent the whole day playing games without leaving his house.

He came out of the room and started running immediately.

I was born and raised in Echizen city.

There is a meeting tomorrow that everyone will participate in.