The guy which stole my purse was arrested.
who
Baseball is the only sport in which I am interested in it.
Baseball is the only sport in which I am interested.
OR
Baseball is the only sport which I am interested in.
She is the woman. I told you about her.
She is the woman whom I told you about.
This is the place where the president of the USA works.
The financial situation who is happening right now is not very promising.
which/that
A myth is a story expresses traditional beliefs.
A myth is a story expressing traditional beliefs.
OR
A myth is a story which / that expresses traditional beliefs.
The music was good. We listened to it last night.
The music which / that we listened to last night was good.
This is a hectic day at the end of November when most major retailers open very early and offer promotional sales.
Black Friday
The person who lie a lot cannot be trusted
lies
On the wall, there is a colorful poster which it consists of a group of young people who dancing.
On the wall, there is a colorful poster which / that consists of a group of young people (who are) dancing.
The man is standing over there. I was telling you about him.
The man whom I was telling you about is standing over there.
This is a country that is also a continent.
Australia
I live in a city that I was born.
where
There are ten universities in Thailand, seven of them are located in Bangkok is the capital city.
There are ten universities in Thailand, seven of which are located in Bangkok, (which is) the capital city.
The meeting was interesting. Oscar went to it.
The meeting to which Oscar went was interesting.
Who would lead the country if the President and Vice-President weren't available?
The Speaker of the House