Triple

Target class: event in the early Solar System
Context triple: [Late Heavy Bombardment era, instanceOf, event in the early Solar System]

• A. planetary system
  A planetary system is a collection of planets and other celestial bodies, such as moons, asteroids, and comets, gravitationally bound to a central star or stars.
• B. feature of the asteroid belt
  A feature of the asteroid belt is any distinct physical, compositional, or dynamical characteristic—such as gaps, families, or resonant structures—that helps describe and differentiate regions or populations within the belt.
• C. reservoir of small Solar System bodies
  A reservoir of small Solar System bodies is a dynamically stable region of space, such as the Kuiper Belt or Oort Cloud, that gravitationally stores large populations of minor objects like comets, asteroids, and icy planetesimals over long timescales.
• D. protoplanet
  A protoplanet is a large, developing body of rock, metal, and/or ice within a protoplanetary disk that has grown massive enough through accretion to begin gravitationally shaping itself and clearing its orbital neighborhood, but has not yet become a fully formed planet.
• E. collisional family
  A collisional family is a group of celestial bodies, typically asteroids, that share similar orbital elements and physical properties because they originated from the fragmentation of a single parent body in a past collision.
• F. None of above. chosen