I got this plant from a yard sale, and have had it for six months. It has many shiny dark green, healthy leaves. New stalks are growing but their leaves are turning yellow and they're dying. What plant is this and what are your suggestions on how to care for it?

[![enter image description here](https://i.stack.imgur.com/CGQcol.jpg)](https://i.stack.imgur.com/CGQcol.jpg)
[![enter image description here](https://i.stack.imgur.com/X1C4pl.jpg)](https://i.stack.imgur.com/X1C4pl.jpg)