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.

Heat oven to 350 degrees F., Heat oil and dressing in skillet on medium-high heat., Add onions; cook 5 min., or until onions start to brown., Add corn and cook 2 min., stirring occasionally., Add beans, cook 1 to 2 min., or until beans are heated through., Place taco shells on baking sheet; bake 5 min., Assemble tacos, starting with lettuce; add bean mixture, tomatoes, green onions and cheese., Serve immediately.
oil, Italian Dressing, onion, kernel corn, taco, tomato, green onions, Philadelphia