Before revision:  Here, based only on sequences, we use a global statistical probability model of  co-variation to detect 3D contacts, in analogy to recently developed breakthrough methods for computational protein folding. In blinded tests on 22 known RNA structures ranging in size from 65 to 1800 nucleotides, the predicted contacts matched physical interactions with 65-95\% prediction accuracy. Importantly, we infer many long-range tertiary contacts, including non-Watson-Crick interactions.
After revision:  Here, based only on sequences, we use a global statistical probability model of co-variation , we predict contact with 65-90\% precision and capture many long-range tertiary contacts, including non-Watson-Crick interactions.