for which label did sachin warrier record his first single ?
select var_a where brack_open var_b rdf_type dbo_Single sep_dot var_b dbo_artist dbr_Sachin_Warrier sep_dot var_b dbo_releaseDate var_c sep_dot var_b dbo_recordLabel var_a brack_close _oba_ var_c offset 0 limit 1