Complex sentence: The FIRST Robotics Competition (FRC) is one of four robotics competition programs organized by FIRST, the other three being FIRST Lego League Jr. (Jr. FLL), FIRST Lego League (FLL), and the FIRST Tech Challenge (FTC).
Split into simpler sentences: The FIRST Robotics Competition (FRC) is one of four robotics competition programs organized by FIRST. The other three being FIRST Lego League Jr. (Jr. FLL), FIRST Lego League (FLL), and the FIRST Tech Challenge (FTC).