<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">darkening</topic></authority><related type="broader"><topic>discoloration</topic></related><variant type="other"><topic>blackening</topic></variant><variant type="other"><topic>browning</topic></variant><variant type="other"><topic>darkened</topic></variant> <note xml:lang="en"><![CDATA[ To make or become dark in shade, value, or color; a form of discoloration: the blackening or browning of materials due to such causes as chemical process, exposure to light, the passage of  time. ]]></note></mads>