This throw in setup is simple but requires good execution and timing.  The player throwing in the ball will look to throw to a player directly in front of them.  Ideally the ball should be thrown to their feet so the player receiving the throw can settle it quickly.  At the same time the ball is thrown in, player #3 will break away from their mark and run to space between players #1 & #2.  Player #2 will play the ball into space for player #3 by using a good first touch to settle the ball or play it into space with the first touch.