Task: Text Categorization
Input (English): This element combines with nitrogen to form cyanides, and it combines with iron to make steel. Sixty atoms of this make a molecule of buckminsterfullerene (BUCK-min-ster-FULL-er-een), and another allotrope, mistakenly referred to as lead and used in pencils, is graphite. It exists in all organic molecules. A molecule made of this element and two oxygen atoms is used by plants in photosynthesis. For 10 points, name this element whose atomic symbol is C.
Output (English): Science