| (subclass Ball GamePiece) | Mid-level-ontology.kif 17008-17008 | |
| (subclass SoccerBall Ball) | Sports.kif 311-311 | |
| (subclass GolfBall Ball) | Sports.kif 325-325 | |
| (subclass VolleyBall Ball) | Sports.kif 345-345 | |
| (subclass BasketBall Ball) | Sports.kif 346-346 | |
| (subclass TennisBall Ball) | Sports.kif 347-347 | |
| (subclass BowlingBall Ball) | Sports.kif 1119-1119 | |
| (subclass ShotBall Ball) | Mid-level-ontology.kif 17015-17015 |
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