message: Increase Monument cost
diff: <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>1</iAsset>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>3</iAsset>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>3</iAsset>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>2</iAsset>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iMaintenanceModifier>-10</iMaintenanceModifier>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>1</iAsset>
  <PrereqTech>TECH_CEREMONY</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  <bCenterInCity>1</bCenterInCity>
  - <iCost>30</iCost>
  + <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>2</iAsset>
  