what are the names of the lahns listed?
feudinge (ruppersbach), ilse, banfe, laasphe, perf, dautphe, wetschaft, ohm, allna, zwester ohm, salzbode, lumda, wieseck, bieber, kleebach, wetzbach, dill, solmsbach, iserbach (mottbach), ulmbach, kallenbach, weil, kerkerbach, emsbach, elbbach, aar, dorsbach, gelbach (aubach), muhlbach, emsbach
of those, which exceed 300 m mouth elevation?
feudinge (ruppersbach), ilse, banfe, laasphe
of those, which exceeds 10 km in length?
banfe