Civilization-specific terrain improvements

[Envisionred]

Since a civilization requires 2 special units/buildings to run properly, what is the XML I need if one of the specials is a terrain improvement? There doesn't seem to be an override for it.

 

[Nutty]

There's not a separate override table; the entries are within the Improvements table itself.

<SpecificCivRequired>1</SpecificCivRequired>
<CivilizationType>CIVILIZATION_CIVNAME</CivilizationType>