I bought a ticket for the concert.

I plan to go to a rock concert being held in Tokyo next week.

You need a ticket to enter the concert.

Entry to the concert is from 6 p.m.

Your cooperation is needed for this project.

I need you.

I tried buying a scratch ticket, but unfortunately, I didn't win.

I bought a ticket for the concert.

He thinks that war is a necessary evil.

Do you understand the necessity of this project?