name the common home port of the noaas ferrel and uscgc dallas ?
SELECT DISTINCT var_uri where brack_open dbr_NOAAS_Ferrel_ attr_open S_492 attr_close dbo_homeport var_uri sep_dot dbr_USCGC_Dallas_ attr_open WHEC-716 attr_close dbo_homeport var_uri brack_close