message: Castle expires with Urban Planning
diff: <Advisor>ADVISOR_MILITARY</Advisor>
  <ArtDefineTag>ART_DEF_BUILDING_CASTLE</ArtDefineTag>
  <PrereqTech>TECH_FORTIFICATION</PrereqTech>
  + <ObsoleteTech>TECH_URBAN_PLANNING</ObsoleteTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  <iCost>100</iCost>
  <Advisor>ADVISOR_MILITARY</Advisor>
  <ArtDefineTag>ART_DEF_BUILDING_SPANISH_CITADEL</ArtDefineTag>
  <PrereqTech>TECH_FORTIFICATION</PrereqTech>
  + <ObsoleteTech>TECH_URBAN_PLANNING</ObsoleteTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  <iCost>50</iCost>
  