what is the military unit whose command structures are iv army corps and iv army corps ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commandStructure dbr_IV_Army_Corps_ attr_open Greece attr_close sep_dot var_uri dbo_commandStructure dbr_IV_Army_Corps_ attr_open Greece attr_close sep_dot var_uri a dbo_MilitaryUnit brack_close