Given an event-centered scenario (Voyager probe's grand tour of the solar system at 7 stops), the learner identifies the kind of body the probe passes at each stop using K8 integration discrimination — Earth (inner planet), Mars (inner planet), a belt asteroid, Jupiter (outer planet), one of Jupiter's moons (moon), Saturn (outer planet), and an icy outer-system body that turns out to be a long-period comet returning.