what is on a ticket that indicates which berth(place)a person is sleeping?

This depends in what country your are traveling

you spelled berth wrong.(birth)

To determine which berth or place a person is assigned to sleep on a ticket, there are a few key elements to look for:

1. Seat/berth number: This is the most important detail on the ticket that indicates the specific location where a person will sleep. The berth number can be a combination of letters or numbers.

2. Coach/compartment information: The ticket may also provide information about the specific coach or compartment where the berth is located. This helps to identify the general area within the train or transport where the person will find their assigned berth.

3. Train/transport details: The ticket may include the details of the train or transport itself, such as the train number or name, departure and arrival times, and the route. These details can further validate the passenger's berth assignment.

To find the information relating to the berth or place a person is assigned to sleep, you should carefully examine the ticket. It typically consists of a combination of alphanumeric codes and text that clearly indicate the specific berth or seat number, as well as other relevant details like the coach or compartment information.