Complex sentence: A player, acting as goalie, defends the goal with their paddle by sticking it up vertically, special rules concern the goalie, such as: the attacking team not being able to interfere with or jostle them.
Split into simpler sentences: A player, acting as goal keeper, defends the goal with their paddle by sticking it up vertically. Special rules concern the goal keeper, such as: the attacking team not being allowed to interfere with or jostle them.