http://www.sec.gov/Archives/edgar/data/200245/000095010320014023/dp132655_424b2-us2006969.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036120016534/brhc10013653_424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036120016546/brhc10013639_424b2.htm