Ternary relationship between entities: Here Ternary means three so$,$ three entities sharing one relation is ternary relationship between entities

REAL WORLS EXAMPLE: here i am taking the example of "reserving slot $"$

Description: here the entities are webinar event, student, speech hall these entities are having the ternary relationship with "reserving slot"

Statements:$($ here the relation is $1$:$1$:M $)$ i$.$for one webinar event is reserving slot for one speech hall and Many students are reserved slots for one webinar event.

here I am adding the picture of ER for Ternary relation.

and the notation is $1$:$1$:M