Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Artist | Composition | Mintage | Issue Price |
| --- | --- | --- | --- | --- |
| 1998.0 | Pierre Leduc | 99.999% pure gold | 1998.0 | $999.99 |
| 1999.0 | Henry Purdy | 99.999% pure gold | 1999.0 | $999.99 |
| 2000.0 | Caren Heine | 99.999% pure gold | 2000.0 | $999.99 |
| 2001.0 | Bonnie Ross | 99.999% pure gold | 2001.0 | $1,019.99 |
| 2002.0 | Dr. A. K. Hellum | 99.999% pure gold | 2002.0 | $1,099.99 |
| 2003.0 | Pamela Stagg | 99.999% pure gold | 2003.0 | $1,099.99 |
| 2004.0 | Catherine Ann Deer | 99.999% pure gold | 2004.0 | $1,099.99 |
| 2005.0 | Chris Jordison | 99.999% pure gold | 2005.0 | $1,295.95 |
| 2006.0 | Susan Taylor | 99.999% pure gold | 2006.0 | $1,489.95 |
| 2007.0 | Sue Rose | 99.999% pure gold | 1400.0 | $1,520.95 |
| 2008.0 | Celia Godkin | 99.999% pure gold | 1400.0 | $1,676.95 |
| 2009.0 | Julie Wilson | 99.999% pure gold | 1400.0 | $2,149.95 |
| 2010.0 | Celia Godkin | 99.999% pure gold | 1400.0 | $2,599.95 |
Question:
What is the composition with an artist of Henry Purdy, a year smaller than 2002, and a mint more than 1,998?
Answer:
99.999% pure gold