Complex sentence: In April 1995, the mill was designated a historic landmark by ASM International, a society that honors works of structural engineering, a list which includes the Statue of Liberty and the Eiffel Tower.
Split into simpler sentences: In April 1995, the mill was designated a historic landmark by ASM International, a society that honors works of structural engineering. Other structures honored by the society are the Statue of Liberty and the Eiffel Tower.