Zip file for each target includes five tab-delimited text files: _ambiR.txt (NMR-derived ambiguous contacts); _dihed.txt (NMR-derived ranges for phi and psi); _ECs.txt (Evolutionary constraints); _RDCs.txt (NMR-derived residual dipolar couplings); _seq.txt (protein/domain sequence).
The guidelines on the NMR-assisted data can be found at: http://predictioncenter.org/casp13/doc/Montelione-CASP_NMR.pdf and http://predictioncenter.org/casp13/doc/NMR_format_descr.pdf