Complex sentence: San Telmo ("St. Pedro González Telmo ") is the oldest"barrio" (neighborhood) of Buenos Aires, Argentina it is a fairly well preserved area of that constantly changing Argentine metropolis and is characterized by its colonial buildings.
Split into simpler sentences: San Telmo ("St. Pedro González Telmo ") is the oldest"barrio" (neighborhood) of Buenos Aires, Argentina. It is a well-preserved area of the Argentine metropolis and is characterized by its colonial buildings.