Complex sentence: It is also an office building & part of the ticket office of the Long Island Rail Road's Atlantic Terminal which has been getting a whole new facelift ever since the mall was built, parts od Atlantic Center were also renovated to compete with the new mall.
Split into simpler sentences: It is also an office building & part of the ticket office of the Long Island Rail Road's Atlantic Terminal which has been getting a whole new facelift ever since the mall was built. Parts of Atlantic Center were also renovated to compete with the new mall.