sentence2_structure: A carbon atom with 6 protons and 8 neutrons<>is<>more specifically known as carbon 14$$$A carbon atom with 6 protons and 8 neutrons<>more specifically known<>as carbon 14
sentence1: The atomic mass unit is defined such that a Carbon atom containing 6 neutrons in addition to its 6 protons has a mass of exactly twelve atomic mass units (this particular isotope with 12 nucleons is known as Carbon-12).
sentence2: A carbon atom with 6 protons and 8 neutrons is more specifically known as carbon 14.
question: A carbon atom with 6 protons and 8 neutrons is more specifically known as?