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.

Place vinegar, wine, shallot, saffron, pepper and tarragon in a saucepan over high heat and let boil until reduced to half., , Meanwhile place egg yolks in blender and whip until thick and frothy. (This can be started after vinegar mixture boils, while you wait for it to reduce), , Once the mixture is reduced, drizzle it into the running blender. Keep it running on high., , Melt the butter in the same saucepan, don't let it boil. Drizzle the butter into the blender in the same way you did previously with the vinegar mixture., , You'll see how as you add the boiling liquids the egg not only emulsifies but also cooks!, , Taste and salt as desired., , Can be served immediately or kept in the blender while still running on low until cool and serve at room temperature.
tarragon vinegar, white wine, shallot, ground white pepper, tarragon leaf, safron threads, egg yolks, unsalted butter, Kosher salt