question: What are the main centers for the Portuguese aerospace industries ?
answer: Alverca , Covilhã , Évora , and Ponte de Sor
turker_answer: Alverca , Covilhã , Évora , and Ponte de Sor are the main centers for the Portuguese aerospace industries .
rule-based: The main centers for the Portuguese aerospace industries are Alverca , Covilhã , Évora , and Ponte de Sor .