1. Computational Learning Theory Team, RIKENAdvanced Intelligent Project, Fukuoka, Japan
2. Department of Electrical and Computer Engineering, College of Science and Engineering, Idaho State University, Pocatello, ID, USA
3. Department of Computer Science, Lakehead University, Thunder Bay, ON, Canada
4. Faculty of Arts and Science, Kyushu University, Fukuoka, Japan
5. Electrical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Wadi Addwasir, Saudi Arabia
6. Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, Canada