Question: The city in which Calisto da Costa trained prior to his participation in the Sydney Olympic Games lies on which sea?
Sentence (from "Victor Ramos (boxer)"): He was one of the first athletes to represent East Timor at the Olympic Games, when he competed at the Men's lightweight Boxing event at the 2000 Summer Olympics in Sydney, though he technically competed as an individual athlete because East Timor was newly independent and had not yet been formally recognized by the International Olympic Committee.
Relevant evidence: No