Complex sentence: After a process of elimination over the next years the SHPO recommended that fifty-three stations be included in a multiple property submission (MPS) thematic nomination (TN); several had been previously designated, some as contributing properties to historic districts.
Split into simpler sentences: After a process of elimination over the next years the SHPO recommended that fifty-three stations be included in a multiple property submission (MPS) thematic nomination (TN). Several had been previously designated, some as contributing properties to historic districts.