Erlewine, Michael Yoshitaka, 2016. “Multiple extraction and voice in Toba Batak.”
AFLA 23: The Proceedings of the 23rd Meeting of the Austronesian Formal Linguistics Association, pages 81–95.

I investigate A’-extraction in Toba Batak. Contrary to the claims of previous work on the language (especially Cole and Hermon 2008), I show that multiple, simultaneous extractions to the left periphery is possible, though only in limited configurations. The pattern of possible and impossible multiple extractions motivates a particular organization of the left periphery: specifically, features associated with C and T begin on a single head, probing together, and then splitting if joint probing yields no matching target. I model this using CT head-splitting (Martinović 2015). The distribution of the optional particle na further supports this approach. Finally, I discuss lessons for the analysis of Austronesian voice and the role of Case.