Intelligent Modelling and Analysis Research Group, School of Computer Science, The University of Nottingham, UK. grazziela.figueredo@nottingham.ac.uk|Intelligent Modelling and Analysis Research Group, School of Computer Science, The University of Nottingham, UK. grazziela.figueredo@nottingham.ac.uk|Intelligent Modelling and Analysis Research Group, School of Computer Science, The University of Nottingham, UK. grazziela.figueredo@nottingham.ac.uk