Table: iseq_20
Columns: date
2_january_2007
19_october_2009
5_november_2010
16_december_2011
30_march_2012

Question: 5 November 2010 of dragon oil 4.02% has what average Date?
SQL: SELECT AVG("date") FROM iseq_20 WHERE "5_november_2010" = 'dragon oil 4.02%'