question: In 2007 Rębała and colleagues studied several Slavic populations with the aim of localizing what ?
answer: the Proto-Slavic homeland
turker_answer: In 2007 Rębała and colleagues studied several Slavic populations with the aim of localizing the Proto-Slavic homeland .
rule-based: In 2007 Rębała and colleagues studied several Slavic populations with the aim of localizing the Proto-Slavic homeland .