which parent company of 1st battalion 21st field artillery regiment was the first team of the 1922 tour de france ?
SELECT DISTINCT var_uri where brack_open dbr_1st_Battalion_21st_Field_Artillery_Regiment_ attr_open United_States attr_close dbp_parent var_uri sep_dot dbr_1922_Tour_de_France dbp_firstTeam var_uri brack_close