'********** resemblance 'Robin is a type of animal if and only if robin is a type of bird. < animal> <=> bird>>. 'Robin is a type of bird if and only if robin can fly. < bird> <=> [flying]>>. %0.9% 19 'Robin is a type of animal if and only if robin can fly. ''outputMustContain('< [flying]> <=> animal>>. %0.90;0.81%')