To make guacamole, cut the avocados in half lengthwise. Remove the pits, and scoop the flesh out of the skin. Next, add all the solid ingredients: cilantro leaves, finely chopped scallions, finely cut tomatoes. Then, add the spices: 2 tablespoons freshly squeezed lime juice, 1/4 teaspoon salt, and 1/2 teaspoon of ground black pepper. Finally, blend with a fork until the mix is just a little lumpy. Which text struce does it have?