http://www.sec.gov/Archives/edgar/data/1000275/000114036118014587/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1080709/000119312518092082/d554957d424b5.htm
http://www.sec.gov/Archives/edgar/data/1517022/000119312518092202/d555650d424b5.htm
http://www.sec.gov/Archives/edgar/data/1701040/000157104918000189/tv488840_424b3.htm