Lindsey exchanges investment real estate parcels with Donna. Her adjusted basis in the property is $400,000, and it is encumbered by a mortgage liability of $200,000. Donna assumes the mortgage. Donna's property is appraised at $1,000,000 and is subject to a $100,000 liability. Lindsey assumes the liability. If no cash is exchanged, what is the amount of gain recognized by Lindsey?