Simplify handling of list command. Handle the case where user don't think to an animal and propose to quit. Add function to test if question exists in our knowledge base
Simplify handling of list command. Handle the case where user don't think to an animal and propose to quit. Add function to test if question exists in our knowledge base

drom/animal,drom/animal,drom/animal,drom/animal,drom/animal,drom/animal