Complex sentence: In 1948, AU moved its site to Plaza Guipit from its present site in Legarda at Sampaloc but was relocated back to its old site in Legarda when a new modern four-storey concrete building was erected in 1955.
Split into simpler sentences: In 1948, from its present site in Legarda at Sampaloc, AU moved to a new site in Plaza Guipit. It was relocated back to its old site in Legarda when a new modern four-storey concrete building was erected in 1955.