Below are sentences I made up with their translations I got from google translate.
The person that goes here. - La persona que va aquí.
The sign that she is gone. - La señal de que ella se ha ido.
The one that got away. - El que se escapó.
The moment that she comes back. - El momento en que vuelve.
The moment that we met. - El momento en que nos conocimos.
The moment that you come back. - El momento en que vuelvas.
The reason that she went away. - La razón por la que se fue.
The moment that got complicated. - El momento que se complicó.
The moment that became important. - *El momento que se hizo importante.*
If you could explain more on the difference between "que" and "de que", that'd be great. I just couldn't find more examples for "de que".