[phenixbb] planarity between atoms of neighboring residues

Dear All, I would like to add restrains between two residues. I was trying to use geometry restrains planarity but I don't know how to select atoms from two different residues. I mean, I have: chain A resid 1 atoms: C5' C' and O1' chain A resid 2 atom: N1' I would like all 4 atoms to be planar. I found example only for atoms from the same residue. Can you help me? Agnieszka