Syntax
Defining relative clauses
Defining relative clauses give extra information
  about a noun.
 Who, whose and that define
 people.
  -  This is the person who/that wrote to
    me and whose brother lives next door.
 
 Which and that define
  things and places.
  -  This is the house which/that Jack built.
 
 Where means "in which" and defines
  places.
 -  This
	is the house where I was born.