whose military units are 3rd u . s . infantry regiment and 2nd cavalry regiment ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_militaryUnit dbr_3rd_U.S._Infantry_Regiment_ attr_open The_Old_Guard attr_close sep_dot var_uri dbo_militaryUnit dbr_2nd_Cavalry_Regiment_ attr_open United_States attr_close brack_close