Original sentence: Because the Trump Tower has both hotel condominiums and residential condominiums, it did not contest the record held by the 80-story Q1 Tower in Gold Coast, Australia as the tallest all-residential building
Edited sentence: Because the Trump Tower has both hotel condominiums and residential condominiums, it did not contest the record held by the 80-story Q1 Tower in Gold Coast, Australia, which is  tall, as the tallest all-residential building