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:
|  | Name | Distance | Date | Location |
| --- | --- | --- | --- | --- |
| 1. | Seppo Simola | 20.15 | July 19, 1972 | Turku, Finland |
| 2. | Matti Yrjölä | 20.04 | August 2, 1972 | Hämeenkyrö, Finland |
| 3. | Bo Grahn | 20.09 | August 3, 1972 | Helsinki, Finland |
| 4. | Reijo Ståhlberg | 20.38 | July 26, 1973 | Turku, Finland |
| 5. | Markku Tuokko | 20.03 | August 18, 1979 | Mikkeli, Finland |
| 6. | Aulis Akonniemi | 20.12 | July 25, 1982 | Ähtäri, Finland |
| 7. | Janne Ronkainen | 20.02 | May 11, 1986 | Leselidse, Soviet Union |
| 8. | Jari Kuoppa | 20.17 | June 12, 1986 | Ähtäri, Finland |
| 9. | Kari Töyrylä | 20.05 | July 2, 1986 | Kauhajoki, Finland |
| 10. | Markus Koistinen | 20.31 | June 13, 1993 | Luumäki, Finland |
| 11. | Mika Halvari | 20.08 | August 4, 1993 | Kotka, Finland |
| 12. | Arsi Harju | 20.16 | March 2, 1997 | Tampere, Finland |
| 13. | Timo Aaltonen | 20.12 | June 20, 1998 | Kuortane, Finland |
| 14. | Jani Illikainen | 20.43 | January 23, 1999 | Haaparanda, Sweden |
| 15. | Ville Tiisanoja | 20.06 | July 31, 1999 | Espoo, Finland |
| 16. | Jarkko Haukijärvi | 20.20 | July 1, 2000 | Eurajoki, Finland |
| 17. | Tepa Reinikainen | 20.01 | February 13, 2000 | Kuopio, Finland |
| 18. | Conny Karlsson | 20.45 | May 31, 2001 | Espoo, Finland |
| 19. | Robert Häggblom | 20.13 | May 20, 2006 | Halle, Germany |
| 20. | Mika Vasara | 20.04 | June 4, 2006 | Leppävirta, Finland |
Question:
who joined the 20 metre club 1 day before bo grahn?
Answer:
Matti Yrjölä