What is the nutritional composition of the following vegetables: eggplant, watercress, and collard greens?

The eggplant is a fruit that is part of the Solanaceae family and has a smooth, shiny skin that can be purple, white, black, yellow, or red.
Watercress is a plant that grows spontaneously in aquatic environments and has a slightly spicy taste.
Collard greens are a biennial variety of cabbage that is part of the Brassicaceae family and is rich in fiber and antioxidants.