Complex sentence: LaDuke became an activist in Anishinaabe issues, helping found the Indigenous Women's Network in 1985 and becoming involved in continuing struggles to regain reservation land lost since allotments to individual households in the nineteenth century.
Split into simpler sentences: LaDuke became an activist in Anishinaabe issues, helping found the Indigenous Women's Network in 1985. She became involved in continuing struggles to regain reservation land lost since in the nineteenth century.