Two people jousting with lances and shields on horses while people watch from under a tent and outside of the tent .
It is probably not the case that people are on horses fighting with each other in front of spectators .
It is certain that people are on horses fighting with each other in front of spectators .
It is probably not the case that people are on horses fighting with each other in front of spectators .
People are on horses fighting with each other in front of spectators .