sequential spin system assignment disambiguation:

 - spin systems 50, 96, 132, and 135 all match the glycine CA(i-1) peak of spin system 31
 - spin system 31 is already assigned to 95D; from the sequence, we know that the preceding
   residue is 93D (and of course 94 is G).
 - SS135: the i-1 peaks do not match the average shifts of D
 - SS132: there are no i-1 peaks, leading me to suspect that it's two consecutive G residues
 - SS50: the CB shift does not match D's average, and the CA of G appears to be an i-1 peak
   based on relative intensity compared to the other CA peak

Thus, only SS96 is left:
 - its CA of G peak is very likely an i peak based on intensity
 - the i-1 peaks match D's average pretty well