**Table 1:** Number of TPs with TDU, total TDU mass, and C, N, and F yields (all in ${M}_{\odot }$ ) for different AGB models of 2 ${M}_{\odot }$ at [Fe/H] = -2.3.
	Model	TPs	$M_{\rm TDU}$	C	N	F
1	Karakas^a	25	0.22	3.7E-02	7.2E-05	1.1E-05
2	pocket^b	"	"	"	"	1.7E-05
3	¹⁸F( $\alpha$ , p) UL^b	"	"	"	"	2.8E-05
4	pocket + UL^b	"	"	"	"	3.3E-05
5	Cristallo^c	14	0.09	1.7E-02	3.4E-05	2.4E-06
6	Cristallo^d	49	0.19	3.1E-2	1.2E-4	1.1E-05

^a Lugaro et al. (2004) and Karakas & Lattanzio (2007); ^b Karakas et al. (2008);
^c Cristallo et al. (2007); ^d Cristallo (2006).

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