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:
| Res. | Record | Opponent | Method | Event | Round | Time | Location |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Loss | 21–8 | Rich Franklin | KO (punch) | UFC 115 | 1.0 | 4:55 | Vancouver, British Columbia , Canada |
| Loss | 21–7 | Maurício Rua | TKO (punches) | UFC 97 | 1.0 | 4:28 | Montreal, Quebec , Canada |
| Loss | 21–6 | Rashad Evans | KO (punch) | UFC 88 | 2.0 | 1:51 | Atlanta, Georgia , United States |
| Win | 21–5 | Wanderlei Silva | Decision (unanimous) | UFC 79 | 3.0 | 5:00 | Las Vegas, Nevada , United States |
| Loss | 20–5 | Keith Jardine | Decision (split) | UFC 76 | 3.0 | 5:00 | Anaheim, California , United States |
| Loss | 20–4 | Quinton Jackson | TKO (punches) | UFC 71 | 1.0 | 1:53 | Las Vegas, Nevada , United States |
| Win | 20–3 | Tito Ortiz | TKO (punches) | UFC 66 | 3.0 | 3:59 | Las Vegas, Nevada , United States |
| Win | 19–3 | Renato Sobral | TKO (punches) | UFC 62 | 1.0 | 1:35 | Las Vegas, Nevada , United States |
| Win | 18–3 | Randy Couture | KO (punches) | UFC 57 | 2.0 | 1:28 | Las Vegas, Nevada , United States |
| Win | 17–3 | Jeremy Horn | TKO (punches) | UFC 54 | 4.0 | 2:46 | Las Vegas, Nevada , United States |
| Win | 16–3 | Randy Couture | KO (punches) | UFC 52 | 1.0 | 2:06 | Las Vegas, Nevada , United States |
| Win | 15–3 | Vernon White | KO (punch) | UFC 49 | 1.0 | 4:05 | Las Vegas, Nevada , United States |
| Win | 14–3 | Tito Ortiz | KO (punches) | UFC 47 | 2.0 | 0:38 | Las Vegas, Nevada , United States |
| Loss | 13–3 | Quinton Jackson | TKO (corner stoppage) | Pride Final Conflict 2003 | 2.0 | 3:10 | Tokyo , Japan |
| Win | 13–2 | Alistair Overeem | KO (punches) | Pride Total Elimination 2003 | 1.0 | 3:09 | Saitama, Saitama , Japan |
| Loss | 12–2 | Randy Couture | TKO (punches) | UFC 43 | 3.0 | 2:39 | Las Vegas, Nevada , United States |
| Win | 12–1 | Renato Sobral | TKO (head kick & punches) | UFC 40 | 1.0 | 2:55 | Las Vegas, Nevada , United States |
| Win | 11–1 | Vitor Belfort | Decision (unanimous) | UFC 37.5 | 3.0 | 5:00 | Las Vegas, Nevada , United States |
| Win | 10–1 | Amar Suloev | Decision (unanimous) | UFC 35 | 3.0 | 5:00 | Uncasville, Connecticut , United States |
| Win | 9–1 | Murilo Bustamante | Decision (unanimous) | UFC 33 | 3.0 | 5:00 | Las Vegas, Nevada , United States |
| Win | 8–1 | Guy Mezger | KO (punch) | Pride 14 | 2.0 | 0:21 | Kanagawa , Japan |
| Win | 7–1 | Kevin Randleman | KO (punches) | UFC 31 | 1.0 | 1:18 | Atlantic City, New Jersey , United States |
| Win | 6–1 | Jeff Monson | Decision (unanimous) | UFC 29 | 3.0 | 5:00 | Tokyo , Japan |
| Win | 5–1 | Steve Heath | KO (head kick) | IFC 9 | 2.0 | 5:39 | Friant, California , United States |
| Win | 4–1 | Paul Jones | TKO (cut) | UFC 22 | 1.0 | 3:53 | Lake Charles, Louisiana , United States |
| Win | 3–1 | Kenneth Williams | Submission (standing rear-naked choke) | NG 11 | 1.0 | 3:35 | Los Angeles, California , United States |
| Loss | 2–1 | Jeremy Horn | Submission (arm-triangle choke) | UFC 19 | 1.0 | 12:00 | Bay St. Louis, Mississippi , United States |
| Win | 2–0 | José Landi-Jons | Decision (unanimous) | IVC 6 | 1.0 | 30:00 | Sao Paulo , Brazil |
| Win | 1–0 | Noe Hernandez | Decision (unanimous) | UFC 17 | 1.0 | 12:00 | Mobile, Alabama , United States |
Question:
Who was the opponent in UFC 19?
Answer:
Jeremy Horn