They are signifying to the referee when or if the ball went out of play that it was kicked out by the opponent and their team should get possession. When the ball goes out of bounds the referee raises the flag he holds pointing in the direction the team who gets possession is trying to score.
They may also do it to appeal for an offside.
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To put it simple it is a referee that enforces the rules of the game.
yes
eva galler does not have a number on her arm;she switched from places to places and neaver got put into a camp. so the german had no numbered record on her.
your suppost to sign them first
I don't know the exact inventor of soccer, though what I do know, is that it was invented in England. I think it was a number of people who invented soccer and not just one person. Look at the question (on this site) Where Did Soccer Originate? I answered that question and it has more information on where it originated and the spread of soccer over the years from when it was invented. (I am not completely sure when soccer was invented though).