Table 2: Lines detected above 5 $\sigma$ in the spectrum of GRB 991216.
$\lambda_{\rm obs}$
$W_{\rm obs}$ (Å) ID $z_{\rm abs}$

4587 $6.6 \pm 1.3$ Fe II $\lambda$ 2600 0.764

4689 $6.2 \pm 1.0$ Fe II $\lambda$ 2600 0.803

4957 $7.0 \pm 0.8$ Mg II $\lambda$ 2800 0.770

5047 $11.0 \pm 0.7$ Mg II $\lambda$ 2800 0.803

5662 $6.6 \pm 0.6$ Mg II $\lambda$ 2800 1.022

**Table 2:** Lines detected above 5 $\sigma$ in the spectrum of GRB 991216.
$\lambda_{\rm obs}$	$W_{\rm obs}$ (Å)	ID	$z_{\rm abs}$
4587	$6.6 \pm 1.3$	Fe II $\lambda$ 2600	0.764
4689	$6.2 \pm 1.0$	Fe II $\lambda$ 2600	0.803
4957	$7.0 \pm 0.8$	Mg II $\lambda$ 2800	0.770
5047	$11.0 \pm 0.7$	Mg II $\lambda$ 2800	0.803
5662	$6.6 \pm 0.6$	Mg II $\lambda$ 2800	1.022

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