The "structure" command, and in fact all of 22Lookup, is a work in progress. It is hoped that a user communtiy will grow and that positive and critical suggestions will help improve the app. Regarding the "structure" command, the idea was to display groupings of text for each blatt in order to provide an initial platform for identification of the fundamental building blocks of the Gemara (statement, question, answer, proof, etc.) This might prove beneficial for teachers or those new to learning. Certainly the "structure" command is a curious beginning in need of refinement. Comments are most welcome.