what is the military unit whose command structures are special forces and special forces ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commandStructure dbr_Special_Forces_ attr_open United_States_Army attr_close sep_dot var_uri dbo_commandStructure dbr_Special_Forces_ attr_open United_States_Army attr_close sep_dot var_uri a dbo_MilitaryUnit brack_close