<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31456174</termId><termName>gas black</termName><termType>PT</termType><termNote><![CDATA[ A form of carbon black that is created by burning natural gas. ]]></termNote><termCreatedDate>2026-03-30 21:02:47</termCreatedDate><relation><relationType>UF</relationType><termId>31456175</termId><termName>black, gas</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31437245</termId><termName>carbon black</termName><termType>PT</termType></relation></term>  </Zthes>