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

1 (6 1/4 ounce) package quick-cooking long grain and wild rice mix, 2 celery ribs, chopped, 1 small onion, chopped, 2 tablespoons butter, divided, 1 (10 3/4 ounce) can cream of mushroom soup, undiluted, 1 (4 ounce) can mushroom stems and pieces, drained, 4 Cornish hens, 24 ounces each, 1/4 teaspoon salt, 1/4 teaspoon pepper
long grain, celery, onion, butter, cream of mushroom soup, mushroom stems, Cornish hens, salt, pepper