win(header(pc,fprule_model_factory,'Pen and pencil rules',nil),130,140,454,512,conts(`~M~J/* Suggestion: transform this to a Classification Tree! */~M~J~M~JIF   purpose IS handwriting~M~JTHEN writing implements ARE true .~M~J~M~JIF   writing implements ARE true AND~M~J     medium IS ink~M~JTHEN Pens ARE true .~M~J~M~JIF   Pens ARE true AND~M~J     nib type IS rollerball~M~JTHEN Biro pens ARE true .~M~J~M~JIF   Pens ARE true AND~M~J     nib type IS pointed~M~JTHEN Fountain pens ARE true .~M~J~M~JIF   Fountain pens ARE true AND~M~J     colour IS red~M~JTHEN Tom's pen IS true .~M~J~M~JIF   Fountain pens ARE true AND~M~J     colour IS blue~M~JTHEN Jean's pen IS true .~M~J~M~JIF   writing implements ARE true AND~M~J     medium IS lead~M~JTHEN Pencils ARE true .~M~J~M~JIF   Pencils ARE true AND~M~J     contents ARE renewable~M~JTHEN Propelling pencils ARE true .~M~J~M~JIF   Pencils ARE true AND~M~J     contents ARE non - renewable~M~JTHEN Traditional pencils ARE true .~M~J`,'Courier',0,13)).