Example of grouping using parent
this TBS template is W3C compliant 
Parameter parentgrp enable you to build a couple of header/footer based on a parent block bound.
United States
| Name | Score |
| Bob | 100 |
| Julia | 99 |
| Mark | 78 |
| Stanley | 110 |
| Robert | 109 |
France
| Name | Score |
| Pierre | 250 |
| Jean | 210 |
| Gaël | 120 |
| Emmanuelle | 260 |
| Louis | 240 |
| Jaques | 200 |