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: Carbon-13 has 6 protons and 7 neutrons.
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?