Noun phrase containing a relative clause

** A relative clause identifies a person or a thing 

Who/That for people vs. Which/That for things 

BUT we often use that instead of who and which .                                 

She´s the one that looks like Margaret Thatcher……..who

the house that´s ( or which is ) painted red and white

With people we use who more often than that

With things we use that more than which 

you live with a cousin who´s got a flat in Leeds ……

The clause who´s got a flat in Leeds identifies the cousin.

Whom replaces a noun used as a complement.

I gave a loaf a bread to a beggar . That is the beggar.  ( That is the beggar whom I gave a loaf of bread)