Stain too dark

I have a dark stain on a chair made from old wood.Now I would like to have it natural.Is there anything I can do to get this look

Use a paint and stain remover to pull out and remove the old stain. It may require more than one application of the remover to get all the old color out, especially if it is the overnight, environmentally friendly type. If it's available in your area and you don't mind using a very strong chemical, methyl chloride strippers are the strongest and fastest. Of course you'll want to wear heavy gloves, long sleeve shirt and long pants while you are using the strong stuff.

Once you've removed the old stain, clean it with mineral spirits to remove all traces of the stripper, then stain it whatever color you like, or leave it natural and coat with a polyurethane.