http://www.sec.gov/Archives/edgar/data/1280600/000104746917006009/a2233370z424b2.htm
http://www.sec.gov/Archives/edgar/data/1170914/000119312517289665/d451518d424b5.htm
http://www.sec.gov/Archives/edgar/data/1600626/000160062617000085/gcear2-424b3xsept2017.htm