Complex sentence: The tower became the tallest residential building in the world in 2011, surpassing Q1, in Gold Coast, Australia, then lost the record in 2012 to the Princess Tower directly across the street.
Split into simpler sentences: The tower became the tallest residential building in the world in 2011, surpassing Q1, in Gold Coast, Australia. However it lost the record in 2012 to the Princess Tower directly across the street.