Instantiating a prefab wont work

Instantiate("FPC",respawnpoint.transform.position, Quaternion.identity);

this code wont work and no matter how much i have searched i havent found a solution , i want to instantiate an object in the transform of another object and this line here has an error : `No appropriate version of 'UnityEngine.Object.Instantiate' for the argument list '(String, UnityEngine.Vector3, UnityEngine.Quaternion)' was found.`

is there any other way i can do the same thing?

You can't instantiate a string, you have to instantiate an object.

var go : GameObject;
...
Instantiate(go);