Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Scrub sweet potatoes. Dry & rub with vegetable oil. Place in shallow baking pan & bake covered 30 min @350 degrees. Allow to cool peel and cut into 3/4 in slices. In saucepan melt 4 T butter over low heat. Add remaining ingredients & mix. Remove from heat. Butter a 3-4 Qt cassarole dish and add sweet potatoes in 3 layers. Pourig 1/3 of sauce over each layer. Bake covered 30 min @350 degrees. Remove from oven & mix w/wood spoon to breakup. Smooth top dot w/butter. Bake 350 degrees 20 min uncovered.
sweet potatoes, vegetable oil, Curacao, T, Bourbon, sugar, cinnamon, nutmeg, cloves, salt, pepper