Complex sentence: Marianne Schnall is the executive director of the women's website and non-profit organization Feminist.com and co-founder of EcoMall.com, a website promoting environmentally-friendly living.
Split into simpler sentences: Marianne Schnall is the executive director Feminist.com, a women's website and non-profit organization. She is also co-founder of EcoMall.com, a website promoting environmentally-friendly living.