name the office holder with associate as marcus aemilius lepidus and has a kid named alexander helios ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_associate dbr_Marcus_Aemilius_Lepidus_ attr_open triumvir attr_close sep_dot var_uri dbo_child dbr_Alexander_Helios sep_dot var_uri a dbo_OfficeHolder brack_close