claim: A thunderstorm requires the presence of lightning.
evidence: The molecular formula C15H24N2O17P2 may refer to  :. Uridine diphosphate glucose. Uridine diphosphate glucose. Uridine diphosphate glucose. Uridine diphosphate galactose. Uridine diphosphate galactose. Uridine diphosphate galactose