Question: Manuel Quintas de Almeida, was a lieutenant in the military of São Tomé and Príncipe, a Portuguese-speaking island nation, in which location?
Sentence (from "São Tomé and Príncipe"): São Tomé and Príncipe ( ; ] ), officially the Democratic Republic of São Tomé and Príncipe, is a Portuguese-speaking island nation in the Gulf of Guinea, off the western equatorial coast of Central Africa.
Relevant evidence: Yes