TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: On which holiday island are the peaks of 'Ruivo' and 'Arieiro', and the airport of 'Santa Cruz'?

SOLUTION: pico do arieiro

PROBLEM: What canal opened in Egypt?

SOLUTION: egypt

PROBLEM: In which European country is the Costa del Sol?

SOLUTION:
costa del sol