(subclass Chicken Poultry) | Mid-level-ontology.kif 20224-20224 | Chicken is a subclass of poultry |
(subclass Hen Chicken) | Mid-level-ontology.kif 20228-20228 | Hen is a subclass of chicken |
(subclass Rooster Chicken) | Mid-level-ontology.kif 20237-20237 | Rooster is a subclass of chicken |