\begin{table}%t1
\par
\caption{\label{tab1}(SiIV+OIV)/CIV measurements.}
%\centerline
 {\small \begin{tabular}{l l l l}
\hline\hline
 Name &  $z$   &  (SiIV+OIV)/CIV  & $\log~\lambda L_{\lambda}^{a}$ \\
\hline
SDSS J000239.4+255035 &  5.80   &  $0.61\pm0.12$   & 46.93 \\
SDSS J000552.3-000656 &  5.85   &  $0.34\pm0.06$   & 46.20 \\
SDSS J001714.66-100055.4$^{{b}}$ &  5.01  &  $0.58\pm0.07$    & 46.56 \\
SDSS J012004.82+141108.2$^{{b}}$ &  4.73  &  $0.32\pm0.03$    & 46.09 \\
SDSS J015642.11+141944.3$^{{b}}$ &  4.32  &  $0.16\pm0.03$    & 46.62 \\
SDSS J023137.6-072855 &  5.41  &  $0.29\pm0.07$                   & 46.56 \\
SDSS J023923.47-081005.1$^{{b}}$ &  4.02   &  $0.23\pm0.04$    & 46.58 \\
SDSS J033829.3+002156 &  5.00   &  $0.97\pm0.29$	       & 46.46 \\
SDSS J075618.1+410408 &  5.07   &  $0.80\pm0.15$	       & 46.53 \\
SDSS J083643.8+005453 &  5.80   &  $0.63\pm0.16$	       & 46.97 \\
SDSS J085210.89+535948.9$^{{b}}$ &  4.22   &  $0.42\pm0.04$  & 46.53 \\
SDSS J095707.67+061059.5 &  5.16  &  $0.70\pm0.14$          & 46.65 \\
SDSSp J102119.16-030937.2 &  4.70  &  $0.35\pm0.12$         & 46.58 \\
SDSS J103027.1+052455 &  6.28   &  $0.59\pm0.20$                   & 46.68 \\
SDSS J104433.04-012502.2$^{{b}}$ & 5.78 &    $0.40\pm0.13$	& 46.88 \\
SDSS J104845.05+463718.3$^{{b}}$ & 6.20 &    $0.42\pm0.20$	& 46.81 \\
SDSS J114816.6+525150 &  6.40   &  $0.41\pm0.08 $	       & 46.95 \\
SDSS J120441.7-002150 &  5.05  &   $0.57\pm0.12 $	       & 46.63 \\
SDSSp J120823.8+001028 &  5.27  &  $0.63\pm0.21 $	      & 46.07 \\
SDSS J130608.2+035626 &  5.99   &  $0.38\pm0.19 $	       & 47.32 \\
SDSS J141111.3+121737 &  5.93   &  $0.57\pm0.13 $	       & 46.58 \\
SDSS J160254.2+422823 &  6.07   &  $0.53\pm0.17 $	       & 46.90 \\
SDSS J160320.89+072104.5 &  4.39  & $ 0.39\pm0.08$           & 46.85 \\
SDSS J160501.21-011220.6$^{{b}}$ & 4.92   & $0.37\pm0.15$ & 46.46  \\
SDSS J161425.13+464028.9 &  5.31  &   $0.34\pm0.03$	 & 46.62 \\
SDSS J162331.8+311201 &  6.22   &     $0.54\pm0.12$	          & 46.54 \\
SDSS J162626.50+275132.4 &  5.20   &  $0.30\pm0.09$	 & 46.94 \\
SDSS J163033.9+401210 &  6.06  &      $0.23\pm0.11$	          & 46.38 \\
SDSS J220008.7+001744 &  4.77   &     $0.55\pm0.07$	          & 46.58 \\
SDSS J221644.0+001348 & 4.99    &     $0.29\pm0.06$	          & 46.18 \\
\hline
\end{tabular}}
\smallskip
$^a$ Rest-frame continuum luminosity at 1450~\AA, in units of erg~s$^{-1}$; $^b$ BAL quasars.
\end{table}