Question: Who served as both the Prime minister and Foreign minister in the 1980's to the sovereign country consisting of six major islands and over 900 smaller islands in Oceania?
Sentence (from "Ezekiel Alebua"): Alebua was the premier of Guadalcanal province from 1998 to 2003, and antagonised some people in that area for not supporting moves to declare that province independent.
Relevant evidence: No