Complex sentence: Projected to cost about 564 million, the line is built by the Doğuş Construction Group and was expected to open in May 2015, however the expected opening day has been revised to 20 September 2016.
Split into simpler sentences: Projected to cost about 564 million, the line is built by the Doğuş Construction Group and is expected to open in May 2015. The expected opening day has been revised to 20 September 2016.