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.

Mix flour and oil in a heavy pot (the heavier, the better). Have water heating., Do not turn on heat under flour and oil until it is thoroughly mixed., Stir constantly over medium heat. When the roux is a dark, rich brown, turn off heat and continue stirring., Add heated water to lower temperature and stop browning., Turn heat back on and add the rest of the ingredients for your stew or gumbo slowly., Makes enough for 1 hen or 2 pounds of shrimp.
flour, salad oil, water