The father and the son.  A table is a piece of furniture.  The father is a man.  The son is a boy.  The two sons are boys.  The father and the boy stand.  That man is the father.  That piece of furniture is a table.  Those three animals are dogs.  That man stands.  The son sits and reads.  Who are those men?  Which man sits and reads?  Which men sit and read?