Complex sentence: The IEEE Ottawa Robotics Competition (ORC) is annual competition hosting over 400 grade 5 to 12 students in Ottawa, Ontario, whereby students compete in a series of Lego Mindstorms and Arduino based robotics challenges.
Split into simpler sentences: The IEEE Ottawa Robotics Competition (ORC) is annual competition hosting over 400 grade 5 to 12 students in Ottawa, Ontario. Students build robots and compete in a series of Lego Mindstorms and Arduino based robotics challenges.