Ordovician Period

Target entity: Ordovician Period
Context triple: [Phanerozoic Eon, contains, Ordovician Period]

• A. Cambrian Period
  The Cambrian Period was an early division of geologic time marked by a rapid diversification of life known as the "Cambrian explosion," during which most major animal groups first appeared in the fossil record.
• B. Silurian
  The Silurian is a geologic period of the Paleozoic Era, roughly 443 to 419 million years ago, marked by the stabilization of Earth’s climate, widespread shallow seas, and significant diversification of early marine life and the first land plants.
• C. Paleozoic Era
  The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
• D. Early Devonian
  The Early Devonian was the initial subdivision of the Devonian Period, marked by the diversification of early fishes and the spread of primitive vascular land plants across emerging terrestrial ecosystems.
• E. Carboniferous period
  The Carboniferous period was a Paleozoic era interval, roughly 359 to 299 million years ago, characterized by extensive swampy forests that formed vast coal deposits and by the diversification of early amphibians and insects.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Ordovician Period
Target entity description: The Ordovician Period was a Paleozoic era interval marked by extensive marine biodiversity, the diversification of early vertebrates and invertebrates, and ending with one of Earth's major mass extinction events.

• A. Cambrian Period
  The Cambrian Period was an early division of geologic time marked by a rapid diversification of life known as the "Cambrian explosion," during which most major animal groups first appeared in the fossil record.
• B. Silurian
  The Silurian is a geologic period of the Paleozoic Era, roughly 443 to 419 million years ago, marked by the stabilization of Earth’s climate, widespread shallow seas, and significant diversification of early marine life and the first land plants.
• C. Paleozoic Era
  The Paleozoic Era was an ancient geologic time interval, spanning roughly 541 to 252 million years ago, marked by the emergence and diversification of complex life in the seas and on land and the assembly of major continental landmasses.
• D. Early Devonian
  The Early Devonian was the initial subdivision of the Devonian Period, marked by the diversification of early fishes and the spread of primitive vascular land plants across emerging terrestrial ecosystems.
• E. Carboniferous period
  The Carboniferous period was a Paleozoic era interval, roughly 359 to 299 million years ago, characterized by extensive swampy forests that formed vast coal deposits and by the diversification of early amphibians and insects.
• F. None of above. chosen