Context: According to mtDNA studies by Holden (2005) and Richards et al. (2006), a significant proportion of the maternal lineages of Somalis consists of the M1 haplogroup. This mitochondrial clade is common among Ethiopians and North Africans, particularly Egyptians and Algerians. M1 is believed to have originated in Asia, where its parent M clade represents the majority of mtDNA lineages. This haplogroup is also thought to possibly correlate with the Afro-Asiatic language family:

Question: When did Richards publish his mtDNA research?
Answer: 2006

Question: Along with Egyptians, Algerians and Somalis, what people commonly possess the M1 haplogroup?
Answer: Ethiopians

Question: On what continent is the M1 haplogroup believed to have originated?
Answer: Asia

Question: Who authored an mtDNA study in 2005?
Answer: Holden

Question: What family of languages is the M1 haplogroup associated with?
Answer: Afro-Asiatic