The cellular origin of glioblastoma is unknown. Accounts differ as to the origin of his name. Provenance is the reconstruction of the origin of sediments. Grading rules differ according to the country of origin. Various explanations of ceviche's origin exist. Ecopoiesis refers to the "origin of an ecosystem". The origin and evolution of Jagannath worship is unclear. Gut microbiome composition depends on the geographic origin of populations. The origin and history of sriracha are debated. Customs duties vary by country of origin and product. There is no consensus over Othello's ethnic origin. The precise origin of absinthe is unclear. The time of their origin is uncertain. There are also a number of foreign residents of Spanish origin. This was especially true for citizens of Greek origin.